Video player does not start fullscreen when selecting a new video in pip mode

[cemrich]

Steps to reproduce:

• start any mediathek show
• switch to picture in picture mode
• navigate to live tab
• start any live stream

Expected: Video player should start the selected live stream in fullscreen mode.

Actual: Selected live stream starts in picture in picture mode.

[cemrich]

This cannot be fixed as we cannot exit picture in picture mode cleanly.