Thats interesting(I spend couple days making this mobile version). Why? I dont have iPad, but tested it on iphone and adroid. Can you please check if same happens when you go to youtube or it has some custom version for iPad?
Mozilla/5.0 (iPad; U; CPU OS OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B367 Safari/531.21.10
You might want to white-list user-agents containing 'iPad' from the redirect.