Is a live session jam with video even possible?

[kempjef]

I suggest you try Jitsi Meet or Discord for video.  Mute audio, keep video.  It does occupy a bit of your computer's CPU, but doesn't seem to greatly affect latency (unlike the JK video app).  But:  for absolute latency minimization, skip all video.

Thanks for the recommendations.
Do you mean using these apps for video in parallel with JK for audio during a live session?

Yes, exactly.  And, if possible, run the video app on a separate machine so that processing on the JK machine isn't affected.