YouTube goes H.264.

Bad quality video is a weak spot with YouTube. However, according to iLounge, YouTube converted all video to H.264 format. Although the H.264 format requires a high performance computer, it means we can enjoy higher quality YouTube video than ever before. Of course, we welcome the new format, but it will be difficult to say that YouTube video is transformative, such as thumbnails. If the video is copyrighted, a potential infringer is not likely to find a fair use excuse.