mpv configs. "~/.config/mpv/", "%appdata%\mpv".

input.conf

# Undo 981a9372
WHEEL_UP seek 10
WHEEL_DOWN seek -10
WHEEL_LEFT add volume -2
WHEEL_RIGHT add volume 2

# Increase/decrease subtitle font size
HOME add sub-scale +0.1
END add sub-scale -0.1

# Rotate image by 90 degrees
F1 no-osd cycle video-rotate 90
F2 no-osd cycle video-rotate -90

# Zoom in/out
F3 no-osd cycle video-zoom 0.5
F4 no-osd cycle video-zoom -0.5

# Audio compressing
F5 af toggle "lavfi=[acompressor=6]"

# Force upmix improper stereo mix as mono.
# Typical use case is a live recording of a mono microphone input
# that's been output as a stereo track, resulting in muted right speaker track.
F6 af toggle "lavfi=[pan=1c|c0=1*c0+1*c1]" ; cycle-values osd-msg1 "Enable stereo upmix" "Disable stereo upmix"

# Reset any video offsets like rotation, zoom, etc.
F7 no-osd set video-rotate 0 ; set video-zoom 0 ; set video-pan-x 0 ; set video-pan-y 0 ; show-text "Reset video offsets"

# Dumb workaround to clear the stuck osd message.
F10 no-osd cycle-values osd-msg1 ""

# Move video rectangle
Alt+left  add video-pan-x  0.01
Alt+right add video-pan-x -0.01
Alt+up    add video-pan-y  0.01
Alt+down  add video-pan-y -0.01

# Playlist navigation
MBTN_BACK playlist-prev ; show-text "Playlist previous"
MBTN_FORWARD playlist-next ; show-text "Playlist next"

mpv.conf

# https://mpv.io/manual/stable/

# Disable mpv's own OSC for custom scripts to override.
# osc=no

# no loud noises pls
volume=50

# no dubs pls
alang=jpn,ja,eng,en,en-us

# no subs pls
sub-visibility=no
# ...but use them in this order if needed
slang=eng,en,en-us,jpn,jp
# ...and make them small
sub-scale=0.5

# cache data for stream buffer
#cache=4096 # Old syntax, invalid on latest. Now defaults to "auto".
# Instead, see docs for --cache-secs and --demuxer-max-bytes for adjusting.
##cache-secs=60 # Old syntax 2, using demuxer-max-bytes for better compat.
cache=yes
demuxer-max-bytes=100MiB

#vo=gpu
# Note from mpv docs:
# See --vo=help for a list of compiled-in video output drivers.
# The recommended output driver is --vo=gpu, which is the default. All other
# drivers are for compatibility or special purposes. If the default does not
# work, it will fallback to other drivers (in the same order as listed by
# --vo=help).

#profile=gpu-hq

## Windows
# GPU decode where possible
# ANGLE requires the libEGL.dll and libGLESv2.dll (if not statically built).
#gpu-context=angle
#hwdec=auto-safe
##gpu-api=d3d11
##d3d11va-zero-copy=yes
##opengl-es=yes

## Linux
# GPU decode where possible
# hwdec=auto-safe

# Limit stream quality for performance on laptops etc. The value "[height <=? 720]" implies 30 fps for YouTube.
#ytdl-format=[height <=? 720]

# Override mpv's no-playlist default.
ytdl-raw-options=yes-playlist=

# Some smooth interp tests for laggy footage
#interpolation=yes
#video-sync=display-resample
#deband=no 
#tscale=box
#tscale-window=quadric
#tscale-clamp=0.0
#tscale-radius=1.025

# This sometimes allows seeking on streams where ffmpeg might not expect it (YouTube, etc)
force-seekable=yes

mpv_thumbnail_script.conf

# Configuration overrides for the mpv_thumbnail_script
# GitHub: https://github.com/TheAMM/mpv_thumbnail_script

# This script path: <mpv configs path>/mpv/script-opts/mpv_thumbnail_script.conf

# Note to future self on setting up multi-threading: see the Github docs for details.
# (Basically duplicate the server jobs config.)

# Use mpv to generate thumbnail even if ffmpeg is found in PATH
# ffmpeg is slightly faster than mpv but lacks support for ordered chapters in MKVs,
# which can break the resulting thumbnails. You have been warned.
# Defaults to yes (don't use ffmpeg)
prefer_mpv=yes

# Explicitly disable subtitles on the mpv sub-calls
# mpv can and will by default render subtitles into the thumbnails.
# If this is not what you wish, set mpv_no_sub to yes
# Defaults to no
mpv_no_sub=yes

# The maximum dimensions of the thumbnails, in pixels
# Defaults to 200 and 200
thumbnail_width=300
thumbnail_height=300

# The thumbnail count target
# (The default of 150 will result in a thumbnail every ~10 seconds for a 25 minute video)
thumbnail_count=38

# Try to grab the raw stream and disable ytdl for the mpv subcalls
# Much faster than passing the url to ytdl again, but may cause problems with some sites
# Defaults to yes
remote_direct_stream=yes

# Allow thumbnailing network paths (naive check for "://")
# Defaults to no
thumbnail_network=yes
# Override thumbnail count, min/max delta, as above
remote_thumbnail_count=19
remote_min_delta=30
remote_max_delta=180

# Try to grab the raw stream and disable ytdl for the mpv subcalls
# Much faster than passing the url to ytdl again, but may cause problems with some sites
# Defaults to yes
remote_direct_stream=yes