Its a coincidence.

no, but don't throw a laptop again

If something did happen, Im quite sure you wouldnt really get into windows. Mabye you have out of date software and it is unable to play the youtube video's due to that. Also it may be your internet connection cutting in and out before the video loads, I know that is a problem if you use wireless internet due to the fact i have it.

Perhaps something moved from its correct spot.
You might have to talk to an experienced person/technician, or you might as well have to reinstall windows. But wait for more answers tho, my answer might not be your best options.

it could be because you have to much stuff on your laptop. download firefox and see if that works.

That, sir, is the worst advice I've ever heard.

Nice avatar pictures Liam.
Really

no shizzle