The screen sharing one has bitten me a couple of times. I record live classes for students, and we've had occasions when someone who was away goes back to the video and it's a black screen with me nattering away as if they can see it :/

That said, apart from the shitty embedding support and their channel management, I REALLY like Stream and using it for a video lesson platform. The captioning is quite good even for my fast talking, Aussie accent and jargon.