>>/1241/
I finally installed it into its own config directory separate from my main mpv config, and I wrote a little helper script to help me invoke mpv with that config.
/.local/bin/pta

#!/bin/sh
exec mpv --config-dir="$HOME/.config/mpv_conf" $@

I'll have to practice using it later.  The first surprise was that you moved quit to capital Q to make accidental quitting harder.  I Ctrl-C'd to quit the first couple of times.