Hey... I had the very same thing. First no video. Did the towel trick bunch of times with temporary results. Also took the case off and used hot hair dryer.
Eventually, I got the three rings, so decided to replace the x clamps. Replaced them with the screws and nylon washers and new silver arctic thermal paste.
When I put it all back together evrything was just perfect.
People are even selling the parts cheap if you find this easier. I got mine at ACE hardware.
http://cgi.ebay.com/...7QQcmdZViewItem