This section of the room control panel allows the room administrator to determine the availability of video and/or the video quality.  There are two quality settings, one for moderators and one for ordinary users.  It is possible to enable video for moderators, while leaving it disabled for non-moderators.

Video is shown only for the person currently speaking, provided that they have a webcam installed.  This means that the speaker must have sufficient upstream bandwidth capacity for both the audio and video.  

Although high quality video can greatly enhance a presentation, enabling video could have the opposite effect if the presenter/speaker has insufficient upstream capacity.  Therefore it is important to test the video settings with the people who will be doing the presenting.