Make playback transparent, allow tap to play/pause anywhere on screen

imilar to other video apps such as Youtube, the black play/pause bar that takes up 20% of the bottom of the history playback feature in phone app needs to be transparent so that you don't miss action in the first three or so seconds. And, once you tap play, you should have an option for the bar to immediately disappear. You should also be able to tap _anywhere_ on the screen bring up the play/pause bar and also tap anywhere to play/pause, rather than having to tap the actual button on the bar.