Youtube video's won't work, but audio ok

During the last couple days, youtube video's have stopped loading on my MBP17. The video screen stays black. Audio works well. I tried uninstalling flash and reinstalling. That worked for 1 day, but the problem is now back.
I've cleared out the cache and the cookies with no luck.

I had the same problem and couldn't find anything around but I came up with this idea and it worked. Try uninstalling Adobe Flash Player from your computer completely. Then go to its website and download not the latest version, but right the previous one and install it. My problem was fixed. The version I download was 10.1.102.64. Hope this is useful.

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