Examples:
file:///var/mobile/Containers/Data/Application/78E5CBA4-C94A-40DB-A0FB-5EA3F49C494F/Documents/audio.mp3
vlc:///var/mobile/Containers/Data/Application/78E5CBA4-C94A-40DB-A0FB-5EA3F49C494F/Documents/audio.mp3