V3 LiveView does not support H295 video. Works fine with H294. The new Client works with both, but the web server apparently does not (although you can login direct to the camera with the browser), and the video capture still works.
Known limitation, browsers do not support HEVC so we would have to transcode to H264…which would use alot of CPU.
But I can log in to the camera with Chrome or Firefox and the live stream seems to work just fine. Maybe instead of just the whirling “processing” have an “unsupported video mode”.