Almost everyone has a YouTube video downloaded by them. Most of the people want to keep their most liked videos and MP3 with them. So converting YouTube videos to audio MP3 on the PC is quite easier but if you want to do it on your iPhone is quite a difficult thing. It is easier to make audio files out of You Tube videos on iPhone and also very useful too. One can access their favorite music videos without accessing internet connection and from the Music app of your iPhone, iPad or iPod Touch.