Adobe Flash Player stops playing after a few seconds on YouTube

[efe]

i used window xp, internet explorer7,
pls my (adobe flash player) stop after playing for some seconds in youtube site and start again, it happen silmotaneously?
pls i don't why it happen like that pls give a fool details about it.
           Thanks for your cooperation.

[Joey]

This exact thing does happen to me on occasion. When it happens to me this is due to my Internet connection. Maybe your internet connection is laggy?

[Malcolm]

Problem is likely with ad blocker in security services or anti-virus. Many of these videos start with a short ad and if the ad is blocked the flash player stops. Turn ad blocker off, voila, everything plays through.