For some reason, webcam is laggy in jitsi. Not all webcams, mind you, some work OK (but still kinda worse than in other conferencing systems, not as smooth)
I tested the same webcam in bigbluebutton and jitsi
Here are 2 very short video clips I made before leaving the office.
it doesn’t GET laggy, it behaves like this from the moment it gets active. I tried changing its quality, it hasn’t helped.
PS nginx+quick install, unstable branch, ubuntu 18.04, 4 vcores, 8GB ram, secure domain enabled,