Hi and welcome to Actionscript.org,
Originally Posted by deedod
When the video is in the normal browser mode
the CPU load runs up to like 1 - 2% max. However,
when I make the video jump to full screen mode
the CPU load skyrockets up to 15 - 20% and just
sits there for the entire video.
What is it that you find so strange about this? When you show your video in browser mode there are probably a lot lets pixels for the CPU to render. However, when you go to fullscreen mode suddenly the video image needs to be scaled up and any more pixels need to be rendered.
Imagine you had to carry a 100 buckets to the sea in 1 hour which would we quite easy. Suddenly they changed your task that you now have to do a 1000 buckets in an hour (in other words, the resolution has changed). That would probably require a lot more effort, don't you think?