An mpv script that speeds up the video when left-click or spacebar is held for 0.5 seconds and reverts it to normal speed when released.

Place hold-to-speedup.lua in your mpv scripts folder

Example:

• Linux/Unix/Mac: ~/.config/mpv/scripts/hold-to-speedup.lua

• Windows: %APPDATA%\mpv\scripts\hold-to-speedup.lua

  (See the Files section in mpv's manual for more info.)

Just press and hold either spacebar or left-click to fast-forward, it's that simple.