How do I view HD and 4K videos on my PC?

[thetmaxx]

This phone shoots HD and 4K videos. I've used both options quite a bit and they play back fine on the phone. However I transfer the .mp4 to my windows 7 PC and nothing will play them back... Windows media player, divx, 5kplayer, quicktime, vlc player. I've tried them all and they all say format not recognized. I'm not sure if it is just the 4k videos or both, but i suspect it is just the 4k stuff. I also tried to convert them, but the video converters cannot recognize the videos? Is the 4k videos only useful on the Sony phone? Has anyone else had this problem? thank you!!