Request support MPV player

[brunogm0]

There is equivalence in basic commands but MPV is better maintained/tested.

mplayer -nosound -benchmark -vo gl foo.mkv
The exact equivalent is mpv --no-audio --untimed --vo=opengl-old foo.mkv.

Also, MPV supports properties like:

Dropped frames, e.g. Dropped: 4. Shows up only if the count is not 0. Can grow if the video framerate is higher than that of the display, or if video rendering is too slow. May also be incremented on "hiccups" and when the video frame couldn't be displayed on time. (vo-drop-frame-count property.) If the decoder drops frames, the number of decoder-dropped frames is appended to the display as well, e.g.: Dropped: 4/34. This happens only if decoder frame dropping is enabled with the --framedrop options. (drop-frame-count property.)

Here is an example of script that reds properties. https://github.com/Argon-/mpv-stats/