Mostly no cameras. I don't even own a webcam.
A meeting is called for a reason (even if it's recurring). We have no "this is the morning meeting" kind of meetings.
There a single person in charge of the meeting. This is most often the person who wants to get resolved the thing the meeting is about. This isn't enforced it's just a natural consequence of someone booking a meeting.
Most meetings are between 2-5 people. Large recurring meetings are maybe max 12-15 people. In the large meeting, there is a rough agenda and everyone speaks to their part of the agenda in turn. Anyone can speak up if they have something relevant to add but otherwise they are muted. This is usually when I get my laundry folded.