Convert YouTube videos to MP4 instantly without software.

YouTube converts the videos uploaded by users into flv format, and when users download these videos back to their systems, they find that this format is not suitable for playing on mobile devices. "YouTube MP4" offers a service to convert YouTube videos into MP4 format, and the conversion speed is surprisingly high. They also provide a Bookmarklet for internet users to use, bringing greater convenience to a vast number of netizens.