Move Chromecast button global
You should have Chromecast button visible everywhere, so we could connect to it before playing the video, and properly disconnect from it after playing the videos. (like Youtube, Daliymotion, ... )
More details :
When you reach the end of the playlist, you can no more open the player view, and thus you can't disconnect from Chromecast anymore.
Also, we must first start playing a video to connect to the Chromecast : this leads to first seconds of video being played on the device, that's annoying on short videos.
You can open the player view from the navigation sidebar in order to disconnect