The simplest way to fix this situation is to take these three steps, which are described in this article. If PowerPoint doesn’t let you insert a MP4 video file, you can fix the problem in a few steps and a modest amount of time.
Actually, there is a smarter way to get rid of the incompatibility issues quickly. Can’t insert the MP4 files to PowerPoint on Mac? That happens and as common, not only to you! An MP4 file is a very complicated format that can be encoded in various ways and your PowerPoint just won’t be able to recognize all of them.