Here's the best online tool for YouTube video to MP4 downloads, and here's why. You can open YouTube app, then hit Share button and choose Copy Link from the list. Then open our YouTube MP4 Downloader and insert the link into the input field, then press Convert button to start. We are gonna check the video real quick, then load the big red button to actually download video MP4 file. All you need to do now is click that button and wait from a few seconds to a few minutes, depending on video size. It is very easy to use this MP4 Downloader, because file downloads automatically when conversion is finished. Enjoy!