Why are all flash videos lagging a lot?

Solution 1:

Recently there was a article about Firefox slowing down on videos due to the internal process that saves all open tabs every 10 seconds - you can increase this by going to about:config and increasing the timeout on browser.sessionstore.interval

Article

That however would not fix the problem with Opera.

Personally, I have a good graphics card and fast CPU and see random problems, slow downs and lag in various flash videos. I think the latest few releases are buggy and need refining as I never had this problem in a older version on a slower machine.

I hope the first solution helps you as I know it has helped a lot of people - just not me!

Solution 2:

Opera and Firefox use the same Flash player, but not Internet Explorer. How is Flash playback with Internet Explorer?

If Flash with Internet Explorer is fine then the issue is with the Flash player for Opera/Firefox. The fix would be to upgrade or reinstall.

Solution 3:

Simply reinstall the latest Flash Player.

Your computer sounds a little old, so maybe you're still using Flash Player 9. We are now on Flash Player 11, as Flash Player might not tell you it needs to be updated.