Dave,
we have done extensive WebRTC (and several other online meeting
apps) testing lately and this paper
methodology for WebRTC based on Chromium and Selenium Grid and
as test orchestrator Jitsi Torture.
I would avoid feeding clients with BBB as video as it is not
representative of a meeting as encoders are optimized for
different kinds of video. There are several video samples
out there.
We have scaled up clients to hundreds with this methodology.
The paper is short so many details have been omitted but there
are not many other options to do this kind of test at scale.
Luca
describes the methodology