|Thanks for this link. I decided to uninstall chrome, and after logging in as an admin on windows XP, I reinstalled chrome as a pack containing upgrade for adobe (acrobat 9) for multiple users. Still back as a user, the YouTube was giving the same problem by not showing the play button. Also the internet explorer was showing the same problem as well but just saying reinstall flash player. I had tried several times to download and re-install flash player but it never worked. But, when I had exhausted all efforts and thought about giving up on YouTube videos, just then, when I tried chrome again, it started working again. Though, I don't recall but perhaps as an admin, I must have reinstalled flash and I guess previously it was all as a user.|
So, the problem is gone for now.