But if you want to download movies as MP4 format on mobiles directly, you can have a check on the Apps and sites recommended for you.
1. Show Box
This is an app that allows you to watch HD movies on mobile for free. But there's one thing that is you can't find it on the Google Play Store, so you need to sideload this app to your mobile. The detailed tutorial for your Android devices is here: https://showbox.best/ and you can download it for your iPhone here: https://showbox.fit/ios/w
Related article: Best Alternative to ShowBox
2. Popcorn Time
Popcorn Time is a stand-alone app that can deal with TV shows and mobile MP4 movies free downloading and streaming. This app is available on android, iOS, Windows and more. Moreover, you can watch your movie or TV episode instantly on Popcorn Time, dubbed or with subtitles. You can download this app from its official site direcly, or find out how to get it for more devices here: https://getpopcorntime.is/