This is for a mobile app. It will be nice if media player’s buttons will be always visible while player is playing. And in should be placed in the notifications area on the phone, as Google Home does. Player’s buttons should be on the locked screen, also. HA should choose the player that is playing now and display it. Also, make settings to disabled this feature. The next step is to transfer the player control buttons to Google Wear watches and Xiaomi sport watches.