To play video in full screen mode just drag pointer across video screen after starting video the menu below will appear:

Clicking on the numbered icons in the video window will produce these results – 1. return to beginning of video 2. Start and Pause 3. Go to next video 4. Volume control for video 5. Closed Captioning 6. Technical Info 7. Leave GOMC & Watch video on YouTube 8. Watch video in full screen mode on GOMC.