So I just found out a big change to YouTube just by experimenting with my Iphone 4. So if you go to YouTube with Safari you are lead to the mobile page. Change it to desk top and go to your video manager click on one of your old videos and youll notice that in desktop mode the window says video unavailable. Now go back to video manager and click on a video uploaded either today or yesterday. You will notice that it has a play button and plays! This is pretty neat.