Demo app which plays music videos from YouTube and in Objective C compatible with iOS 8 or later (including 10). No design required, the app must only be able to play music video when the phone goes in background. The app must continue playing the song in background when user presses Home button or presses Power button to lock his/her device. In lock mode the FWD and RWD buttons must show and allow user to move to the following song or to come back to the previous one and the player must show Youtube preview image in lock mode.
The app must work seamless when it goes in background and should always continue playing the current song (without a 1 second pause) and user should be able to control the music video in lock mode, pausing the song, playing it again, moving forward or moving backwards and to see the preview image of the youtube video.
No graphics needed, it's only a demo.