Hi, Pat
Thankx for your reply. I was away busy doing other things. My OS is window 7 and it happened only with ATT.Yahoo. When I clic video on You Tube, it says I need Adove Flash Player installed in red box. And right beside it, there was another note and it says "You are using outdated browser, which You Tube no longer supports. Since some features on You Tube may not work. You are viewing a lightweight version of the video page. Go back to the regular page.". When I clic the " go back to the regular page" viedeo started to play. It never happened before until I reported on Wednesday. Same video played normal on Google Chrome. My current Adove Flash Player is 11 Active X.