diff --git a/html/canvas/element/manual/imagebitmap/createImageBitmap-drawImage.html b/html/canvas/element/manual/imagebitmap/createImageBitmap-drawImage.html
index 574ee16b59a380..6f15a10eccec0b 100644
--- a/html/canvas/element/manual/imagebitmap/createImageBitmap-drawImage.html
+++ b/html/canvas/element/manual/imagebitmap/createImageBitmap-drawImage.html
@@ -9,19 +9,33 @@
 <link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
 <body>
 <script>
-function testCanvasDisplayingPattern(canvas, width, height)
+function testCanvasDisplayingPattern(canvas, width, height, sourceIsVideo)
 {
-    var tolerance = 10; // for creating ImageBitmap from a video, the tolerance needs to be high
-    const check = (x, y, r, g, b, a) =>
+    var tolerance = 1;
+    let topLeft = [255, 0, 0, 255];
+    let topRight = [0, 255, 0, 255];
+    let bottomLeft = [0, 0, 255, 255];
+    let bottomRight = [0, 0, 0, 255];
+    if (sourceIsVideo) {
+        // The source video uses colors in the Rec.601 color space whose
+        // values are close to full red, full green, full blue, and black,
+        // but when converted to sRGB, are somewhat different.
+        topLeft = [247, 37, 0, 255];
+        topRight = [63, 251, 0, 255];
+        bottomLeft = [28, 35, 255, 255];
+        bottomRight = [5, 0, 2, 255];
+    }
+    const check = (x, y, [r, g, b, a]) =>
         _assertPixelApprox(canvas, x,y, r,g,b,a, `${x},${y}`, `${r},${g},${b},${a}`, tolerance);
-    check(1 * width / 4, 1 * height / 4, 255,0,0,255);
-    check(3 * width / 4, 1 * height / 4, 0,255,0,255);
-    check(1 * width / 4, 3 * height / 4, 0,0,255,255);
-    check(3 * width / 4, 3 * height / 4, 0,0,0,255);
+    check(1 * width / 4, 1 * height / 4, topLeft);
+    check(3 * width / 4, 1 * height / 4, topRight);
+    check(1 * width / 4, 3 * height / 4, bottomLeft);
+    check(3 * width / 4, 3 * height / 4, bottomRight);
 }
 
 function testDrawImageBitmap(source, args = [], { resizeWidth = 20, resizeHeight = 20 } = {})
 {
+    let sourceIsVideo = source instanceof HTMLVideoElement;
     var canvas = document.createElement("canvas");
     canvas.width = resizeWidth;
     canvas.height = resizeHeight;
@@ -30,7 +44,7 @@
         assert_equals(imageBitmap.width, resizeWidth);
         assert_equals(imageBitmap.height, resizeHeight);
         ctx.drawImage(imageBitmap, 0, 0);
-        testCanvasDisplayingPattern(canvas, resizeWidth, resizeHeight);
+        testCanvasDisplayingPattern(canvas, resizeWidth, resizeHeight, sourceIsVideo);
     });
 }
 
diff --git a/html/canvas/element/manual/imagebitmap/createImageBitmap-flipY.html b/html/canvas/element/manual/imagebitmap/createImageBitmap-flipY.html
index e8b5010f6c4c2f..f1fea5971fe5cd 100644
--- a/html/canvas/element/manual/imagebitmap/createImageBitmap-flipY.html
+++ b/html/canvas/element/manual/imagebitmap/createImageBitmap-flipY.html
@@ -9,26 +9,37 @@
 <link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
 <body>
 <script>
-function testCanvasDisplayingPattern(canvas, width, height, flipped)
+function testCanvasDisplayingPattern(canvas, width, height, sourceIsVideo, flipped)
 {
-    var tolerance = 10; // for creating ImageBitmap from a video, the tolerance needs to be high
-    const check = (x, y, r, g, b, a) =>
-        _assertPixelApprox(canvas, x,y, r,g,b,a, `${x},${y}`, `${r},${g},${b},${a}`, tolerance);
+    var tolerance = 1;
+    let topLeft = [255, 0, 0, 255];
+    let topRight = [0, 255, 0, 255];
+    let bottomLeft = [0, 0, 255, 255];
+    let bottomRight = [0, 0, 0, 255];
+    if (sourceIsVideo) {
+        // The source video uses colors in the Rec.601 color space whose
+        // values are close to full red, full green, full blue, and black,
+        // but when converted to sRGB, are somewhat different.
+        topLeft = [247, 37, 0, 255];
+        topRight = [63, 251, 0, 255];
+        bottomLeft = [28, 35, 255, 255];
+        bottomRight = [5, 0, 2, 255];
+    }
     if (flipped) {
-        check(1 * width / 4, 3 * height / 4, 255,0,0,255);
-        check(3 * width / 4, 3 * height / 4, 0,255,0,255);
-        check(1 * width / 4, 1 * height / 4, 0,0,255,255);
-        check(3 * width / 4, 1 * height / 4, 0,0,0,255);
-    } else {
-        check(1 * width / 4, 1 * height / 4, 255,0,0,255);
-        check(3 * width / 4, 1 * height / 4, 0,255,0,255);
-        check(1 * width / 4, 3 * height / 4, 0,0,255,255);
-        check(3 * width / 4, 3 * height / 4, 0,0,0,255);
+        [topLeft, bottomLeft] = [bottomLeft, topLeft];
+        [topRight, bottomRight] = [bottomRight, topRight];
     }
+    const check = (x, y, [r, g, b, a]) =>
+        _assertPixelApprox(canvas, x,y, r,g,b,a, `${x},${y}`, `${r},${g},${b},${a}`, tolerance);
+    check(1 * width / 4, 1 * height / 4, topLeft);
+    check(3 * width / 4, 1 * height / 4, topRight);
+    check(1 * width / 4, 3 * height / 4, bottomLeft);
+    check(3 * width / 4, 3 * height / 4, bottomRight);
 }
 
 function testDrawImageBitmap(source, args = [], flipped, { resizeWidth = 20, resizeHeight = 20 } = {})
 {
+    let sourceIsVideo = source instanceof HTMLVideoElement;
     var canvas = document.createElement("canvas");
     canvas.width = resizeWidth;
     canvas.height = resizeHeight;
@@ -37,7 +48,7 @@
         assert_equals(imageBitmap.width, resizeWidth);
         assert_equals(imageBitmap.height, resizeHeight);
         ctx.drawImage(imageBitmap, 0, 0);
-        testCanvasDisplayingPattern(canvas, resizeWidth, resizeHeight, flipped);
+        testCanvasDisplayingPattern(canvas, resizeWidth, resizeHeight, sourceIsVideo, flipped);
     });
 }
 
diff --git a/html/canvas/element/manual/wide-gamut-canvas/canvas-display-p3-drawImage-ImageBitmap-video.html b/html/canvas/element/manual/wide-gamut-canvas/canvas-display-p3-drawImage-ImageBitmap-video.html
new file mode 100644
index 00000000000000..11a136fd5007ca
--- /dev/null
+++ b/html/canvas/element/manual/wide-gamut-canvas/canvas-display-p3-drawImage-ImageBitmap-video.html
@@ -0,0 +1,55 @@
+<!DOCTYPE HTML>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="canvas-display-p3.js"></script>
+<body>
+<script>
+// Test that drawing ImageBitmaps with different video source color profiles
+// into sRGB and Display P3 canvases works, by reading pixels with
+// getImageData() as sRGB and Display P3 values.
+for (let [filenameBase, expectedPixels] of Object.entries(videoTests)) {
+    for (let contextColorSpace of ["srgb", "display-p3"]) {
+        for (let imageDataColorSpace of ["srgb", "display-p3"]) {
+            for (let cropSource of [false, true]) {
+                async_test(function(t) {
+                    let video = document.createElement("video");
+                    video.onloadeddata = t.step_func(function() {
+
+                        let canvas = document.createElement("canvas");
+                        canvas.width = 2;
+                        canvas.height = 2;
+
+                        let ctx = canvas.getContext("2d", { colorSpace: contextColorSpace });
+
+                        let imageBitmapPromise;
+                        if (cropSource)
+                            imageBitmapPromise = createImageBitmap(video, 1, 1, 1, 1);
+                        else
+                            imageBitmapPromise = createImageBitmap(video);
+
+                        imageBitmapPromise.then(t.step_func_done(function(imageBitmap) {
+                            video.remove();
+                            ctx.drawImage(imageBitmap, 0, 0);
+
+                            let imageData = ctx.getImageData(0, 0, 1, 1, { colorSpace: imageDataColorSpace });
+
+                            let expected = expectedPixels[`${contextColorSpace} ${imageDataColorSpace}`];
+                            assert_true(pixelsApproximatelyEqual(imageData.data, expected), `Actual pixel value ${[...imageData.data]} is approximately equal to ${expected}.`);
+                        }), t.step_func(function(error) {
+                            video.remove();
+                            throw error;
+                        }));
+                    });
+                    for (let format of ["mp4", "webm"]) {
+                        let source = document.createElement("source");
+                        source.src = `resources/${filenameBase}.${format}`;
+                        source.type = `video/${format}`;
+                        video.append(source);
+                    }
+                    document.body.append(video);
+                }, `${filenameBase}, Context ${contextColorSpace}, ImageData ${imageDataColorSpace}, cropSource=${cropSource}`);
+            }
+        }
+    }
+}
+</script>
diff --git a/html/canvas/element/manual/wide-gamut-canvas/canvas-display-p3-drawImage-video.html b/html/canvas/element/manual/wide-gamut-canvas/canvas-display-p3-drawImage-video.html
new file mode 100644
index 00000000000000..34c45d24672f7a
--- /dev/null
+++ b/html/canvas/element/manual/wide-gamut-canvas/canvas-display-p3-drawImage-video.html
@@ -0,0 +1,46 @@
+<!DOCTYPE HTML>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="canvas-display-p3.js"></script>
+<body>
+<script>
+// Test that drawing videos with different color spaces into sRGB and Display P3
+// canvases works, by reading pixels with getImageData() as sRGB and Display P3
+// values.
+for (let [filenameBase, expectedPixels] of Object.entries(videoTests)) {
+    for (let contextColorSpace of ["srgb", "display-p3"]) {
+        for (let imageDataColorSpace of ["srgb", "display-p3"]) {
+            for (let scaleImage of [false, true]) {
+                async_test(function(t) {
+                    let video = document.createElement("video");
+                    video.onloadeddata = t.step_func_done(function() {
+
+                        let canvas = document.createElement("canvas");
+                        canvas.width = 2;
+                        canvas.height = 2;
+
+                        let ctx = canvas.getContext("2d", { colorSpace: contextColorSpace });
+                        if (scaleImage)
+                            ctx.drawImage(video, 0, 0, 10, 10);
+                        else
+                            ctx.drawImage(video, 0, 0);
+                        video.remove();
+
+                        let imageData = ctx.getImageData(0, 0, 1, 1, { colorSpace: imageDataColorSpace });
+
+                        let expected = expectedPixels[`${contextColorSpace} ${imageDataColorSpace}`];
+                        assert_true(pixelsApproximatelyEqual(imageData.data, expected), `Actual pixel value ${[...imageData.data]} is approximately equal to ${expected}.`);
+                    });
+                    for (let format of ["mp4", "webm"]) {
+                        let source = document.createElement("source");
+                        source.src = `resources/${filenameBase}.${format}`;
+                        source.type = `video/${format}`;
+                        video.append(source);
+                    }
+                    document.body.append(video);
+                }, `${filenameBase}, Context ${contextColorSpace}, ImageData ${imageDataColorSpace}, scaleImage=${scaleImage}`);
+            }
+        }
+    }
+}
+</script>
diff --git a/html/canvas/element/manual/wide-gamut-canvas/canvas-display-p3.js b/html/canvas/element/manual/wide-gamut-canvas/canvas-display-p3.js
index 921bbd71f5eeb2..c6ee97b7880a4a 100644
--- a/html/canvas/element/manual/wide-gamut-canvas/canvas-display-p3.js
+++ b/html/canvas/element/manual/wide-gamut-canvas/canvas-display-p3.js
@@ -207,6 +207,59 @@ const svgImageTests = {
     },
 };
 
+// Each video:
+//  * is 300x200 and has a single color
+//  * has a filename base that indicates its contents:
+//
+//      <color-space>-<8-or-10-bit-color-value>
+//
+//  * was generated using commands like:
+//
+//      W=300 H=200 Y=3F Cb=66 Cr=F0 ; \
+//        perl -e "print pack('c', 0x$Y) x ($W * $H), pack('c', 0x$Cb) x ($W * $H / 4), pack('c', 0x$Cr) x ($W * $H / 4)" | \
+//        ffmpeg -f rawvideo -pix_fmt yuv420p -s:v ${W}x$H -r 25 -i - -pix_fmt yuv420p -colorspace bt709 -color_primaries bt709 -color_trc iec61966_2_1 sRGB-FF0100.webm
+//
+//      W=300 H=200 Y=0BB Cb=1BD Cr=2EF ; \
+//        perl -e "print pack('s', 0x$Y) x ($W * $H), pack('s', 0x$Cb) x ($W * $H / 4), pack('s', 0x$Cr) x ($W * $H / 4)" | \
+//        ffmpeg -f rawvideo -pix_fmt yuv420p10le -s:v ${W}x$H -r 25 -i - -c:v libx265 -vtag hvc1 -pix_fmt yuv420p10le -colorspace bt2020nc -color_primaries bt2020 -color_trc bt2020-10 Rec2020-222000000.mp4
+//
+//      W=300 H=200 Y=0BB Cb=1BD Cr=2EF ; \
+//        perl -e "print pack('s', 0x$Y) x ($W * $H), pack('s', 0x$Cb) x ($W * $H / 4), pack('s', 0x$Cr) x ($W * $H / 4)" | \
+//        ffmpeg -f rawvideo -pix_fmt yuv420p10le -s:v ${W}x$H -r 25 -i - -vcodec libvpx-vp9 -profile:v 2 -pix_fmt yuv420p10le -colorspace bt2020nc -color_primaries bt2020 -color_trc bt2020-10 Rec2020-222000000.webm
+//
+//    where the Y'CbCr values were computed using https://jdashg.github.io/misc/colors/from-coeffs.html.
+const videoTests = {
+    // Rec.709 Y'CbCr (0x3F, 0x66, 0xF0) = sRGB (0xFF, 0x01, 0x00)
+    "sRGB-FF0100": {
+        "srgb srgb": [255, 1, 0, 255],
+        "srgb display-p3": [234, 51, 35, 255],
+        "display-p3 srgb": [255, 0, 0, 255],
+        "display-p3 display-p3": [234, 51, 35, 255],
+    },
+    // Rec.709 Y'CbCr (0x32, 0x6D, 0xD2) = sRGB (0xBB, 0x00, 0x00)
+    "sRGB-BB0000": {
+        "srgb srgb": [187, 0, 0, 255],
+        "srgb display-p3": [171, 35, 23, 255],
+        "display-p3 srgb": [187, 1, 0, 255],
+        "display-p3 display-p3": [171, 35, 23, 255],
+    },
+
+    // 10 bit Rec.2020 Y'CbCr (0x126, 0x183, 0x3C0) = Rec.2020 (0x3FF, 0x000, 0x000)
+    "Rec2020-3FF000000": {
+        "srgb srgb": [255, 0, 0, 255],
+        "srgb display-p3": [234, 51, 35, 255],
+        "display-p3 srgb": [255, 0, 0, 255],
+        "display-p3 display-p3": [255, 0, 9, 255],
+    },
+    // 10 bit Rec.2020 Y'CbCr (0x0BB, 0x1BD, 0x2EF) = Rec.2020 (0x222, 0x000, 0x000)
+    "Rec2020-222000000": {
+        "srgb srgb": [186, 0, 0, 255],
+        "srgb display-p3": [170, 34, 23, 255],
+        "display-p3 srgb": [186, 0, 0, 255],
+        "display-p3 display-p3": [169, 0, 3, 255],
+    },
+};
+
 const fromSRGBToDisplayP3 = {
     "255,0,0,255": [234, 51, 35, 255],
     "255,0,0,204": [234, 51, 35, 204],
@@ -223,7 +276,7 @@ const fromDisplayP3ToSRGB = {
 
 function pixelsApproximatelyEqual(p1, p2) {
     for (let i = 0; i < 4; ++i) {
-        if (Math.abs(p1[i] - p2[i]) > 2)
+        if (Math.abs(p1[i] - p2[i]) > 3)
             return false;
     }
     return true;
diff --git a/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-222000000.mp4 b/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-222000000.mp4
new file mode 100644
index 00000000000000..71ad32c5f00c35
Binary files /dev/null and b/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-222000000.mp4 differ
diff --git a/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-222000000.webm b/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-222000000.webm
new file mode 100644
index 00000000000000..5e4eae49dc11dd
Binary files /dev/null and b/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-222000000.webm differ
diff --git a/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-3FF000000.mp4 b/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-3FF000000.mp4
new file mode 100644
index 00000000000000..0e2880a93abdb0
Binary files /dev/null and b/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-3FF000000.mp4 differ
diff --git a/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-3FF000000.webm b/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-3FF000000.webm
new file mode 100644
index 00000000000000..4f28de8ceaf770
Binary files /dev/null and b/html/canvas/element/manual/wide-gamut-canvas/resources/Rec2020-3FF000000.webm differ
diff --git a/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-BB0000.mp4 b/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-BB0000.mp4
new file mode 100644
index 00000000000000..59572f513873cc
Binary files /dev/null and b/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-BB0000.mp4 differ
diff --git a/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-BB0000.webm b/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-BB0000.webm
new file mode 100644
index 00000000000000..23a6364bdb709d
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diff --git a/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-FF0100.mp4 b/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-FF0100.mp4
new file mode 100644
index 00000000000000..37a29f9f831602
Binary files /dev/null and b/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-FF0100.mp4 differ
diff --git a/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-FF0100.webm b/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-FF0100.webm
new file mode 100644
index 00000000000000..31b69af924fbc3
Binary files /dev/null and b/html/canvas/element/manual/wide-gamut-canvas/resources/sRGB-FF0100.webm differ
