I know that this might be a backend problem with QT, however, as soon as I try to enter Youtube with Otter, Otters CPU usage rises for about 50% whenever youtube actually does anything.
I have a pretty strong Laptop, so although it should rise it should not rise so much.
Assuming you have a dual core, shouldn't you expect your CPU usage to rise to 50% (i.e. 100% of one core) for a second or so whenever you switch pages? Or do you mean it uses more than some other browser during playback?
@bluedragon77, if you are using flash player then I doubt that you can do anything about it.
Native media playback under Linux uses GStreamer (but not 1.x by default), perhaps you could make use of hardware acceleration but your instance is missing some plugin.
http://docs.gstreamer.com/display/GstSDK/Playback+tutorial+8%3A+Hardware-accelerated+video+decoding
Speaking of Youtube, I am only having audio played when viewing a video on it when its using HTML5 to show them.