[Feature Request] Option to ping-pong video at end

[SolarLune]

This is a really cool project - it's great to have a simple live wallpaper option for Linux. Thanks a lot for your effort!

Description
It might be nice to add the option to ping-pong the video after playback - that way, videos that don't loop ordinarily don't cut violently at the end and can make the experience more pleasant.

OS and Shell Information
Please provide your OS name and version, GNOME Shell version, and the session type (X11/Wayland).

• OS: Endeavour OS
• GNOME Shell: 43.4
• Session type: Wayland

EDIT: For audio, the audio can just play forward normally or be muted in this case, if reversing the audio is problematic.