I suppose that might be an option, but in my experience people are highly unlikely to grant a site permission to their camera if they aren't using it as part of

I suppose that might be an option, but in my experience people are highly unlikely to grant a site permission to their camera if they aren't using it as part of a conference call. But I do agree if you have some A/B testing, that the users are doing it as a part of a study, it might be usable.