I've been reading about how to make YouTube videos look really good. There's quite a good article here: http://tinyurl.com/6lz636
BUT the most useful thing I discovered was how to link to and embed the High Quality MP4 versions that you can toggle to watch on the site. If you're posting/linking to a YouTube video, add &fmt=18 to the end of the URL and it'll play in HQ. Doesn't work for embeds, but I found a way to cheat it: add &ap=%2526fmt%3D18 to the end of both URLs in the embed code and it'll embed as a High Quality MP4 video. NO MORE SHITTY YOUTUBE EMBEDS! http://tinyurl.com/5c9e3h