Samsung Note 9 high FPS videos won't play on Mac? (black screen)
Try the following:


use the adobe media encoder preferably, or some other encoder to encode the file as something like prores422 or prores4444.
use a different player, like vlc, djv, etc.
Check if you have all codecs installed, for quicktime and h.264, etc.
Open the file on a different machine. If it still won't work, it's probably the file that's the root of the problem.


How big is the video-file? If it's around 3mb or something, that might indicate that there is no visual information in the file in the first place. If the file is moderately big, the problem might be with the player and/or the codecs on your machine.