If there is a need to download many YouTube videos to MP4 or download all videos from a YouTube playlist, the use of online tools is not the best choice. It’ll be very time consuming, because you have to repeated copy and paste video URLs. In such a case, you can use iFunia YouTube Downloader for Mac. This app support batch downloading YouTube videos to MP4. It also allows users to download all videos from a playlist to MP4 with just one click. It doesn’t have a Windows version, but you can find some Windows alternatives to this app, such as iTube Studio.