The camera is the reaction, not the content
A quiz on its own is a test: you answer, you score, you move on. Add video and the quiz becomes the excuse for everyone to be in the same place — the questions carry the evening, and the camera carries the reactions. The value is not in staring at each other; it is in seeing the groan when someone gets an easy one wrong, and the grin when they steal the lead on the last question.
This is the opposite of open-ended random video chat, where the camera is the whole point and there is nothing to actually do. Here the game gives everyone a reason to stay, so the conversation happens around the questions instead of being forced from nothing.
It is always optional
On omequiz, camera and microphone are off until you switch them on, they apply per room and per session, and you can turn them off again mid-game without leaving. A quiz plays exactly the same with text only, so nobody is ever obliged to be on screen to take part. If you would rather not show your room, background effects let you blur or replace what is behind you.
When to leave the camera off
Cameras up suits a small group who know each other and want the hangout. Cameras off suits a faster, more competitive game, a larger room, or simply an evening when people do not want to be seen. A public lobby with strangers is usually better off text-only to start — the game gives everyone something shared to talk about, and cameras can come on later if the room warms up.
Keeping it comfortable
A few things keep video pleasant. Agree that switching off mid-game is normal, not a snub. Use the report button if anyone behaves badly — it takes one click and does not interrupt your round. And remember that everyone in the room is there to play a quiz, not to perform; the camera is there to share a laugh, and that is all it needs to do.