The full screen control does not make the video go full screen.
The full screen control responds to the press and changes to be ‘restore to normal size’ but the video does not change size.
To reproduce, play the video in the embedded status below and click full screen.
I first saw the bug in v2.1.0.beta2 +251 - may have been present before.
I am not at my desktop machine so can’t test it on that configuration but the issue is there on mobile chrome on Android.