I have an eCommerce website at slingerstraps.com (guitar straps) using the TwentyEleven template. The 2 videos on the homepage play fine on PC's and tablets. For some reason they don't play the audio on smart phones unless a headset is plugged in? The 2 videos on the "Artist Video" page will only play correctly if the phone is in Horizontal/ Full Screen mode? It's not a phone setting issue as I've tried it on many phones. Does anyone know if there is a setting or a plug in that can fix these issues? Thanks for your time!