Now you know three ways of compressing MP4 described through using Movavi Video Converter. These ways should work for both high-resolution and low-resolution videos. However, suppose your video has a resolution of Full HD 1080p or higher. In that case, you can downsize the MP4 by changing the resolution to a smaller one (e. g., HD 720p). This option works if you want to watch the compressed video on a small screen, for example, from a phone or a small tablet. To do so, open the video in the program, and, in the Video tab, click MP4 and select MP4 H.264 - HD 720p. Below, you can see the approximate compressed file sizes after changing video resolution from Full HD 1080p to HD 720p using Movavi Video Converter. Of course, these are just average results given as an example.