Q:"How can you resize an MP4 video?" - Quora

In our daily life, we are quite confused by the size of the video. For example, if you want to share your homemade MP4 video to YouTube or other social platforms, you find that there is a size limit. Or the high-definition widescreen MP4 video you got from a friend cannot be played on your personal small device. All cases make it a must to resize MP4 for handy online sharing, offline playback and even file management.