I was taken into Miguel's meeting, but since the host wasn't presented, it simply let me know it was waiting for him (It also had a friendly notice "Your video will turn ON automatically when the meeting starts".
I've changed my settings in Video > Meetings, just like in Zoom, to turn off my vid when joining. Also confirmed that the server is running on port 19424 (via terminal command 'lsof -i :19424').
BlueJeans 423 [...] TCP localhost:18171 (LISTEN)
$ nc 127.0.0.1 18171
GET / HTTP/1.0
HTTP/1.1 200 OK
Server: Swifter 1.3.3
Then you need to find where the plist files are (i.e. com.bluejeans.app.detector.plist).
You can disable an entry from launchctl list:
launchctl disable uid/<your user uid>/com.bluejeans.app.detector
You can also unload if you find the actual file
launchctl unload ~/Library/LaunchAgents/com.bluejeans.app.detector.plist
There were a couple differently named bluejeans agents.