[MX Player] MonoS94:
Just tried with a fairly light HEVC

General
Unique ID : 233256108378273613508079923083100502025 (0xAF7B7E0CDB9BC744A2DCAAA7621F3809)
Complete name :
Format : Matroska
Format version : Version 4 / Version 2
File size : 454 MiB
Duration : 19mn 56s
Overall bit rate : 3 186 Kbps
Encoded date : UTC 2015-06-29 18:25:57
Writing application : mkvmerge v7.9.0 ('Birds') 64bit
Writing library : libebml v1.3.1 + libmatroska v1.4.2
_STATISTICS_WRITING_APP : mkvmerge v7.9.0 ('Birds') 64bit
_STATISTICS_WRITING_DATE_UTC : 2015-06-29 18:25:57
_STATISTICS_TAGS : BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
DURATION : 00:19:18.157000000
NUMBER_OF_FRAMES : 222
NUMBER_OF_BYTES : 6085

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main@L4@Main
Codec ID : V_MPEGH/ISO/HEVC
Duration : 19mn 56s
Bit rate : 1 843 Kbps
Width : 1 920 pixels
Height : 800 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.050
Stream size : 263 MiB (58%)
Title :
Writing library : x265 1.7+231-3a5cd130f908:[Windows][GCC 4.8.2][64 bit] 8bit
Encoding settings : wpp / ctu=64 / min-cu-size=8 / max-tu-size=32 / tu-intra-depth=3 / tu-inter-depth=3 / me=2 / subme=4 / merange=57 / no-rect / no-amp / max-merge=3 / temporal-mvp / early-skip / rdpenalty=0 / no-tskip / no-tskip-fast / strong-intra-smoothing / no-lossless / no-cu-lossless / no-constrained-intra / fast-intra / open-gop / no-temporal-layers / interlace=0 / keyint=250 / min-keyint=23 / scenecut=40 / rc-lookahead=40 / lookahead-slices=0 / bframes=8 / bframe-bias=0 / b-adapt=2 / ref=5 / limit-refs=0 / weightp / weightb / aq-mode=1 / aq-strength=2.00 / cbqpoffs=0 / crqpoffs=0 / rd=4 / psy-rd=1.00 / rdoq-level=0 / psy-rdoq=0.00 / signhide / deblock=-1:-1 / sao / no-sao-non-deblock / b-pyramid / no-cutree / rc=crf / crf=20.0 / qcomp=0.60 / qpmin=0 / qpmax=51 / qpstep=4 / ipratio=1.40 / pbratio=1.30
Default : Yes
Forced : No
Color range : Limited
Matrix coefficients : BT.709

Audio #1
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 19mn 56s
Bit rate mode : Constant
Bit rate : 640 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Compression mode : Lossy
Delay relative to video : 10ms
Stream size : 91.3 MiB (20%)
Title : AC3 5.1
Language : English
Default : No
Forced : No

Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 19mn 56s
Bit rate mode : Constant
Bit rate : 640 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Compression mode : Lossy
Delay relative to video : 10ms
Stream size : 91.3 MiB (20%)
Title : AC3 5.1
Language : Italian
Default : No
Forced : No

Text #1
ID : 4
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : Forced
Language : Italian
Default : Yes
Forced : Yes

Text #2
ID : 5
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : Normal
Language : Italian
Default : No
Forced : No

Text #3
ID : 6
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : SHD
Language : English
Default : No
Forced : No

I had to make mxplayer use all the core and it seems to works just fine :D