Not that there's anything wrong with flexible hours. I'm just thinking it should be a different conversation. In those cases it would make sense to me to have "mandatory times" where the video stream is active (meetings, team working, etc.) and other times when it's off.
In some cases flexible time is the only option that makes sense- I've worked with people from 6 to 12 time zones away, but never on a full-time basis.
And you can still turn the stream off if you want to concentrate. I can't do that in open office.
If the monitor was turned off for some reason it immediatly turned into eavesdropping as people simply won't feel that you are there. So I think it was important that audio would only travel if person listening was being seen. That really helps the lizard brain to sense that someone is present.