Typhoon h

My computer does not play high resolution video well at all if I try to play it directly from the SD card. But it works fine if I copy the video to the computer itself and play it.
The issue can also be in the device you are using for playback. Have you tried playing the video on a different computer/tablet, etc?

Some other suggestions:
Try a different brand SD card. Not all SD cards are equal. The higher the video resolutions and frame rates, the higher quality SD card you need.
Use some plastic safe contact cleaner on the SD card slot by spraying the cleaner on the card and insert/remove several times.
It may be necessary to replace the SD card slot, but that is pretty rare.