
The Sansa®TakeTV™ video player enables you to copy video media files from your computer, via its USB port and then play them back through your tv.

There are short-comings. The unit will only play .avi files and certain .divx flavours, but it's still a kick to watch the latest Dr Who a couple of hours after its UK broadcast as I did last evening. The video quality is as good as the original file. HD downloads look very good indeed.
If you want to watch your downloads on tv then I can recommend the TakeTV.
* I should add, I have no connection with the manufacturers or retailers other than as a satisfied customer.
*See my hifi / media index here.