Just seems like a confusing mess to me, with controls on each video and sync'ed controls on the side. If you can't hide the individual video controls, I'd merge the two videos into a single video stream before embedding it. That's how bad I find the UI. Have you sat any people down in front of this thing and watched what they clicked? First thing I did was hide that huge sidebar covering the video, then I messed with the individual controls and figured out that is not good, then finally brought the sidebar back...