I don't really mind download times or size of the video. I want to know the type of file which gives the best picture quality. When I download video you know you get a choice to download either mpeg, avi, etc etc...) since now I've always chose avi because I am sure that I can play them on my pc since I've played them before. I have the K-Lite Mega Codec Pack installed. Would that be able to play all video formats? Is avi the best quality? If not, which one would be the best quality and which decoder would I be needing for it? Thanks!