CFTsoft Free YouTube 2 MP4 Convert, as its name, is free and can be used to convert YouTube to MP4. It is a good program for you if you want to convert YouTube to MP4 accidently. It can convert at superfast speed and the converting result is relatively good. The interface is really simple, so it's easy-to-use. You can master it even without any help. It is a professional YouTube to MP4 converter. Just try it.