Add mpv to full screen compton list

compton.conf

@@ -202,7 +202,7 @@ sw-opti = true;
 # paint-on-overlay may make the flickering less obvious.
 unredir-if-possible = true;
 
-unredir-if-possible-exclude = [ "name *= 'Firefox Nightly'" ]
+unredir-if-possible-exclude = [ "name *= 'Firefox Nightly'", "name *= 'mpv'"]
 
 # Specify a list of conditions of windows that should always be considered focused.
 focus-exclude = [ ];