If users already have a YouTube video saved to their computer but it’s not in the MP4 format, then it’s most likely saved as an FLV file.
Download VLC if you don’t have it yet, and then follow these steps: If users want to download a YouTube video to MP4 with VLC, users have to take what might seem similar to a few somewhat strange steps, but they’re actually in fact straightforward and simple to understand. How do users convert YouTube videos in MP4 A file with the MP4 file extension is an abbreviation for a MPEG-4 Video file, which is a compressed file format that can contain not only video but also audio and subtitles. Why download in MP4 format? When the YouTube video is saved to MP4, users can play it on their phone or another device because MP4 is extensively used, much more so than FLV.