diff --git a/conf/mpv.conf b/conf/mpv.conf
index 5002a11b..73eaa97f 100644
--- a/conf/mpv.conf
+++ b/conf/mpv.conf
@@ -22,3 +22,7 @@ video-sync=display-resample
 interpolation
 tscale=oversample
 
+# When watching YouTube videos, don't eat all CPU and bandwidth and be
+# even more unpleasant to use!
+# https://github.com/mpv-player/mpv/issues/4241#issuecomment-327033395
+ytdl-format=bestvideo[height<=?720][fps<=?30][vcodec!=?vp9]+bestaudio/best