How to stop computer's screen from flashing?

How can I stop my computer from flashing white on my screen when I scroll or watch videos?

• when I watch videos and scroll, random rectangular shapes just flash white on the screen. I also can't record stuff on the screen, which sucks too. This is on an Intel Mac Leopard.

• Answer:

  Okey, i see!! Maybe it's because of the heavy online traffic. I used to have the same problem. In this case, you can try to download the vid before watching. I'm using a free downloader called Moyea flv downloader. It downloads very fast with high quality and supports full screen. It is very easy to handle. You needn't get the url when downloading the vid. Just press "start recording" Click in the page where the vid is playing The downloader will automatically save it to your hard disk. Then you can watch it with the embedded flv player. You can search "flv downloader" on google.com for more info. Here is the official link. http://www.flvsoft.com/focus_flv/ Good luck.