How can I change playback speed of mpv video player?
Are there shortcut keys to change the playback speed in mpv?
You need to refer to the Reference Manual:
The reference manual lists all the options and configuration options mpv understands, key bindings, scripting, and other customizations.
Use the following keys:
[ and ] Decrease/increase current playback speed by 10%.
{ and } Halve/double current playback speed.
Backspace Reset playback speed to normal.
Source: mpv.io