it seems that every time I watched a QT movie full screen that my fans turned on right away, but when I watched it in VLC it too much longer, so I decided to do a simple test, I would simply play the same movie in both VLC and QT and find out the % processor in activity monitor. When I did the test QT was using ~55% and VLC was using ~15% at the same window size and both running flawlessly. Just wanted to see if others have the same problem and to see if there is a way to make QT more efficient.