Mpv is a free, open-source, media player. It needs a video in order to run and will not start by simply launching the program.
Set your video default programs to use mpv and they will automatically use the player when opened.

Download

http://mpv.io/installation

https://sourceforge.net/projects/mpv-player-windows/files/

Install

Windows

Unzip and move the mpv folder to your C:\Program Files\.

Front Ends

Extended User Interfaces

Configuration

There is no graphical interface, you will need to configure the settings using a file.

Using a text editor, create a file named config (with no file extension, All types (*.*)) in the directory C:\Users\[USER]\AppData\Roaming\mpv

A basic high-quality playback configuration:

# GENERAL #
keep-open=yes
priority=high
autofit-larger=100%x95%
geometry=50%:50%
stop-screensaver
screenshot-format=png
screenshot-template=mpvsnap-%tY.%tm.%td-%tHh%tMm%tSs%00n
screenshot-tag-colorspace=yes
 
# VIDEO #
gamma-auto
icc-profile-auto
hwdec=auto-copy
profile=opengl-hq
scale=ewa_lanczossharp
cscale=ewa_lanczossoft
dscale=mitchell
dither-depth=8
temporal-dither
deband-grain=0
demuxer-readahead-secs=5.0
framedrop=vo
 
# AUDIO #
audio-file-auto=fuzzy
ao=wasapi
ad-lavc-downmix=yes
audio-channels=2
af-defaults=volume=replaygain-track:replaygain-clip=yes:detach
af-add=rubberband,volume
alang=eng,en,enUS,en-US,jpn,jp
softvol=yes
softvol-max=150
 
# SUBTITLE #
sub-auto=fuzzy
demuxer-mkv-subtitle-preroll
slang=eng,en,enUS,en-US
blend-subtitles
embeddedfonts=no
sub-pos=97
sub-use-margins
sub-ass-force-margins
sub-fix-timing=no
sub-text-font-size=44
sub-text-color="#FFFFFF"
sub-text-font="Noto Sans"
sub-text-border-size=2
sub-text-border-color="#262626"
ass-style-override=force
ass-force-style=Kerning=yes
ass-shaper=simple
 
# STREAMS #
cache=auto
cache-initial=1024
cache-default=250000 #kb
cache-backbuffer=25000 #kb
cache-secs=30
cache-file=TMP
cache-seek-min=1024
ytdl=yes
ytdl-format=(bestvideo[ext=webm]/bestvideo[fps=60])+(bestaudio[acodec=opus]/bestaudio)/best
 
# OSC & OSD #
osc=yes
video-osd=yes
osd-level=1
osd-scale=0.5
osd-scale-by-window=yes
osd-fractions=yes
bar-height-inactive=0
 
# EXTENSIONS # 
[extension.webm]
cache=no
loop-file=inf
 
[extension.jpg]
cache=no
pause
 
[extension.png]
cache=no
pause
 
[extension.gif]
cache=no
loop-file=inf

Low Quality

profile=opengl:deband
hwdec=auto

Medium Quality

profile=opengl-hq
hwdec=auto

High Quality

profile=opengl-hq:scale=ewa_lanczossharp:cscale=ewa_lanczossoft
hwdec=auto

Very High Quality

profile=opengl-hq:scale=ewa_lanczossharp:cscale=ewa_lanczossoft:prescale-luma:superxbr
hwdec=auto

Ultra Quality

profile=opengl-hq:scale=ewa_lanczossharp:cscale=ewa_lanczossoft:prescale-luma=nnedi3
hwdec=auto