Thanks for your patience, the 500 error is now fixed!https://twitter.com/TeamYouTube/status/980889488531521536 …
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I was hacked and channels blocked for no reason. I'm absolutely sure that this is an annoying robot (Youtube algorithms) error! Full history with arguments and facts here on Google + https://plus.google.com/u/0/115350880172783209551/posts/Zoq2suzx3ZF …pic.twitter.com/8HGvp3FudP