This is only happening with iphones, not all iphones mind you. I have a video on my mobile optimized demo squeezepage here:
Check it on your iphone. I have an HTC Desire android, so i cannot replicate the problem. I'm using the video from www.m.youtube.com, the HQ version and my settings are set to display all videos on mobiles from withing my YouTube account.
Seems to be no clear answer anywhere i look.
Appreciate any feedback.