Sorry to hear you are having difficulties. Flash Player is not supported in the Google Chrome browser for Android. Have you tried the viewing the same websites/videos using the default browser on the Galaxy S2? Try that and let me know how it goes.
I have done as you suggested works perfectly on stock browser thanks.
By chance can you recommended good mobile/android browsers compatible with flash?
I really liked chrome but it does not work with flash.
The default browser is the only Android browser which supports the Flash Player.
I have an S2 running ICS 4.0.3 and switched my default browser back to the standard phone browser (From Chrome) and still cannot view a Vimeo post that I made on my FB page. It still says my device does not support this.
Firefox and Dolphin browser both runs flash really well. You need to have flash installed on your galaxy first. If you need help installing flash to your galaxy, this might help: http://flashforthegalaxy.com/install-flash-galaxy-s/