From a recent insight on LinkedIn:
Keep that camera on! A key component of in-person communication is reading body language. Remember, 70% of what’s conveyed in a conversation is non-verbal. An in-person conversation from behind a door is pointless, and silly. A video call is much the same. So, again, keep that camera on!
Some people say they can’t keep the camera on for various reasons (excuses). Kids. Improper clothing. Improper setting. That can indicate a lack of professionalism. It also can indicate a lack of interest. If people are truly engaged, you’ll see it in their faces.
What about keeping the camera off because it’s “not your turn?” Good question. Why are you in the meeting if you have nothing to add/listen for? Then have them call you in when they’re ready.