Nick Thissen wrote:If you also set the video in a Widget, then the Media Player list will get an additional entry with the name of the Widget. If you "Play" that widget, it will play the video in the widget. If you "Play" the video, it will play it in fullscreen.Thaaaat's what it was. All good now, thanks!
Via Actions, you have to select the Target to play. You can either select the video itself (it will play in full screen), or you can select the Widget (it will play in the widget).