Ah, --keep-open seems to work the best. The other two options don't seem to be necessary, at least in my setup.
About a year ago when I typed in man mpv I got immediately to a proper man page linked from a German man serverGoogle
Now I have to jump to DuckDuckGo to get the same results
Since #mpv is #MPlayer with a gui it's nice yet not surprising it does static images too
#MEncoder also has some nice goodies
I make ogm files when I encode streams with it. Vorbis goes multichannel {5.1+} with no issues
#ffMPeg will blow your socks off with its Easter Eggs 🥚
mpv's manpage is all I'd need to read if stuck on a desert island for 20 years. XD
According to my little function it's over 300 pages!
manlength ()
{
local output lines pages;
local linesperpage=48;
if output=$(man "$@" | wc); then
echo " Pages Lines Words Chars";
lines=$(echo "$output" | awk '{print $1}');
pages=$(echo "$lines/$linesperpage" | bc -l);
printf "%7.1f%s\n" "$pages" "$output";
fi
}