[tfouto]

That is a h264 video

You could check out a few HEVC/h265 videos here or here.

The Big Buck Bunny1080p MPEG2 TS, HEVC+AAC 1713 kbps sample utilize about 50% of the i5-4250u CPU with HD 5000 on a MacBook Air running MplayerX, which is more or less equal to the new i5 NUC. The internal XBMC DVDplayer was not so fond of this format. The vide decoder is probably not optimized yet, but it is utilizing 50% less than the demo video on the DivX 10 web pages..

http://www.divx.com/en/hevc

Can you check the % here? 4k shouldn't handle. What about the 1080p HEVC?