Jitsi torture video missing

Hi everyone,

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.
Any ideas?
Thanks, Tim