I just opened a few videos in both QuickTime Player and VLC, and I was invariably able to exit full screen mode, i.e. no menu bar, by hitting "escape".

I think, though, that he first time it happened "escape" didn't work.

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire