Was it ever perfectly clear on your computer? Sometimes your video card can be to slow to run these big HD files. Do you have a smart phone? Send that same file to your smart phone. If it is clear on your smart phone then it is your video card on your computer and not the actual file that is the issue.
Like acesvett said has it ever been clear on your computer? My older computer cannot play anything over 1080p, I had to buy a new gammer laptop to play 4K and edit with ease. The image is so clear I may need to get a P4P to replace my P4 now in order to get the maximum experience, (that's what I will tell my wife anyways)
Looks like the card read rate is too slow or your computer and or video card can't keep up. If you can try to play the file on another faster computer. To rule out the card copy the file to your hard drive, if it's the same it probably your computer, but could also be a too slow wright rate of the card. You can test card read and wright speeds on many computers. Some companies ratings of cards is way off.
No. I have four Apps on my iPad.
