Is it possible to replace the streaming video from the camera (from the browser) with the recorded video?

Question

linux

There is a browser (any). Streaming video goes through it (the same webcamtoy, for example). Question: is it possible to change the streaming video from the camera to the saved video?

Answer 1

can
vlc2vcam.com

Answer 2

Very real when attacking MITM.
It is necessary to understand stream formats. Since on-the-fly encoding is too resource-intensive, it's better to have a prepared stream.