As per US law, the download of copyrighted material, regardless of its format, is illegal. Fortunately, not all videos on YouTube are copyrighted. There are plenty of videos and songs that are copyright- or royalty-free.
As per US law, the download of copyrighted material, regardless of its format, is illegal. Fortunately, not all videos on YouTube are copyrighted. There are plenty of videos and songs that are copyright- or royalty-free.