upload to youtube, works on everything but iphone and android, video works on phones but sound is garbled

IWhen I upload the videos to youtube after editing in final cut pro, the videos will play fine on computer and my ipad, but something happens on iphone and android phones. The video will work on these mobiles, but the sound is all screwed up. In more depth, the interviews I recorded on my zune h4n are screwed up but the music i overlayed is actually perfect.

Also, if i plug in headphones to send the audio from my phone to airplay speakers, it works fine. the audio only stops working through iphone speakers. help?