Dont understand to switch camera from the app to the client

[tcaruchet]

Hello, I do not understand with the structure how from a button on my application, order the client to change a camera by another. I do not understand the structure and I can not request the client with its SDK (impossible to import on the node.js server)…

I wonder how to do it, I have my button on the server with my index.pug page and I would like it to switch camera on the client but I do not understand how I can do it…

I need to use a Zoom App. What the public folder mean ? It's not used... But it have the SDK.

I thank you very much.