You MUST use a HEVC compatible player in order to watch it. There are a lot out there but I recommend POTplayer.
Format : Matroska
Format version : Version 4 / Version 2
File size : 1.56 GiB
Duration : 1h 53mn
Overall bit rate : 1 957 Kbps
Movie name : American.Reunion.2012.UNRATED.1080p.BluRay.DTS.x264-CtrlHD
Encoded date : UTC 2016-04-25 17:59:22
Writing application : mkvmerge v9.1.0 ('Little Earthquakes') 64bit
Writing library : libebml v1.3.3 + libmatroska v1.4.4
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L4@Main
Codec ID : V_MPEGH/ISO/HEVC
Duration : 1h 53mn
Bit rate : 1 756 Kbps
Width : 1 920 pixels
Height : 1 040 pixels
Display aspect ratio : 1.85:1
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.037
Stream size : 1.40 GiB (90%)
Writing library : x265 1.9+140-34a3d35c5f97:[Windows][GCC 5.3.0][64 bit] 10bit
Encoding settings : wpp / ctu=64 / min-cu-size=8 / max-tu-size=32 / tu-intra-depth=1 / tu-inter-depth=1 / me=1 / subme=2 / merange=57 / no-rect / no-amp / max-merge=2 / temporal-mvp / no-early-skip / rdpenalty=0 / no-tskip / no-tskip-fast / strong-intra-smoothing / no-lossless / no-cu-lossless / no-constrained-intra / no-fast-intra / open-gop / no-temporal-layers / interlace=0 / keyint=250 / min-keyint=23 / scenecut=40 / rc-lookahead=20 / lookahead-slices=6 / bframes=4 / bframe-bias=0 / b-adapt=2 / ref=3 / limit-refs=3 / no-limit-modes / weightp / no-weightb / aq-mode=1 / qg-size=32 / aq-strength=1.00 / cbqpoffs=0 / crqpoffs=0 / rd=3 / psy-rd=2.00 / rdoq-level=0 / psy-rdoq=0.00 / no-rd-refine / signhide / deblock=0:0 / sao / no-sao-non-deblock / b-pyramid / cutree / no-intra-refresh / rc=2 / pass / bitrate=1756 / qcomp=0.60 / qpmin=0 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ipratio=1.40 / pbratio=1.30
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.709
Transfer characteristics : SMPTE ST 2084
Matrix coefficients : BT.709
Mastering display color primaries : R: x=0.640000 y=0.330000, G: x=0.300000 y=0.600000, B: x=0.150000 y=0.060000, White point: x=0.312700 y=0.329000
Mastering display luminance : min: 0.0001 cd/m2, max: 400.0000 cd/m2
Maximum Content Light Level : 400 cd/m2
Maximum Frame-Average Light Level : 400 cd/m2
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : HE-AAC / LC
Codec ID : A_AAC
Duration : 1h 53mn
Bit rate : 199 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz / 24.0 KHz
Frame rate : 23.438 fps (1024 spf)
Compression mode : Lossy
Delay relative to video : 40ms
Stream size : 162 MiB (10%)
Language : English
Default : No
Forced : No
Text #1
ID : 3
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Duration : 1h 53mn
Bit rate : 74 bps
Count of elements : 2138
Stream size : 61.7 KiB (0%)
Language : English
Default : No
Forced : No
Text #2
ID : 4
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Duration : 1h 52mn
Bit rate : 58 bps
Count of elements : 1849
Stream size : 48.0 KiB (0%)
Language : Spanish
Default : No
Forced : No
Text #3
ID : 5
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Duration : 1h 52mn
Bit rate : 69 bps
Count of elements : 1902
Stream size : 57.7 KiB (0%)
Language : French
Default : No
Forced : No
