I have a number of movies downloaded onto an external Hard Drive that are in the .avi format. I also have a Phillips Ambilight TV with a USB input on the side. If I connect the Hard Drive then I can navigate the contents on the TV, but it says that there are no playable files. How can I convert these .avi files into something that will play on the TV? BTW - I'm a techno-whimp, and need basic stuff. Please don't confuse me with long geeky words!