When I did delete history, I can't get sped dial anymore. When I log in to the opera sync page, I see that they are there, but when I log in to the browser and synchronize the data, it won't download and display them. What to do?

I use opera 19 and can not play YT on browser. i used to Opera 12 and have same problem.
Reinstalling adobe flash didn't solve problem.
video start to play about 1-2 sec and then stop.
Problem whit YT videos isn't on others browsers.
I use Win XP.
How to solve my problem?