MP4 is just a container, the specific audio/video streams can be one of several different codecs, and if you don’t have the codec used it won’t work. If you can identify the encoding you could probably just download a codec and be good to go.
Edit: for this video the video codec is Codec: MPEG-H Part2/HEVC (H.265) (hvc1) and audio codec is Codec: MPEG AAC Audio (mp4a)