I have been stting up a Jitsi test environment for load and performance testing with torture.
I followed the this fantastic guide: Tutorial: Loadtesting Jitsi with MalleusJitsificus on a Selenium Grid and everything is working except the injection of the video.
I used the fakeVideoStream.y4m as well as the FourPeople_1280x720_30.y4m but success there.
I am running Selenium 3.141.59 and Chrome Driver 87.0.4280.20 with the current Chrome version on Ubuntu 18.04 Desktop clients running in the cloud. Audio files are working.
Jitsi Meet setup is vanilla.