Have just bought an iphone 5s
Downloaded music videos from my old iphone 4 via itunes.
They can only be viewed in portrait, also once a playlist is paused it cannot be restarted
Have downloaded the latest version of itunes and restarted and reset the new handset.
Have also gone to download the playlist of music videos to another iphone and exactly the same problem happens
Have tried reloading back onto my old iphone 4 (which now has a new sim card) and the music videos are only viewable in portrait