Youtube's HTML5 video playback on my 3Ghz i7 is so bad that I rarely watch videos in browser. Now it's even worse as all videos play in low quality unless you use DRM enabled "tech".
This is what I use instead: mplayer -fixed-vo $( youtube-dl -gf mp4 $* "$link" )
This is what I use instead: mplayer -fixed-vo $( youtube-dl -gf mp4 $* "$link" )