I noticed that YouTube was not using HTML5 even though my browser supports it and I have HTML5 selected in the config. Upon further research, by default they only deliver HTML5 if the user has selected this in their YouTube settings. In order to force it to deliver HTML5 you need to actually put "html5=1" into the embed request.

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#1 youtube_html5.patch470 bytesakoepke

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new470 bytes

Attached is a patch which adds this to the video_filter_youtube_html5() function