I could be wrong but I believe that you need to purchase a seperate cable (not the micro usb that comes with the phone) to get video out to your TV.I thought I seen a video out option.. Is there a plug to connect to the phone to the tv? Or have to be wireless like the my touch 4g
You can find a cheap one on eBay.
You guys think this could work? Found it on ebay
New Micro HDMI 5FT Cable for T-Mobile HTC Sensation 4G | eBay