Comment by cpncrunch

The title is click-baity. What it allows is a website to automatically join you into a meeting with the camera enabled and without you asking. So it's annoying, but it doesn't let a website secretly grab your video without you knowing.

The reason webrtc has permissions per site is because webrtc can indeed grab your video without you realising, so it's important to give each site permission to use your camera. This isn't the case with zoom...it pops up a massive window when you enter the meeting.