Added to the URL, when not assigned to a group, you don't hear or see anything
&groupmodeadded to your URL, when not assigned to a group, you don't hear or see anything. This also goes for remote participants who are not in a group - you will not see or hear them if they are not in a group, even if you also are not in a group.
The default normally with VDO.Ninja is that if not in a group, you see and hear everyone. This remains true if not using
&groupmode, even if others in the room are. Others may not be able to see or hear you though, if they have
&groupmodeenabled, and you haven't picked a group. So,
&groupmodeonly impacts the local user, and will not impact remote connections.