=== HTTP code : 200 ===

HTTP/1.1 301 Moved Permanently
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HTTP/1.1 200 OK
Expires: Tue, 27 Apr 1971 19:44:06 EST
X-XSS-Protection: 1; mode=block; report=https://www.google.com/appserve/security-bugs/log/youtube
P3P: CP="This is not a P3P policy! See http://support.google.com/accounts/answer/151657?hl=en for more info."
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Date: Thu, 06 Dec 2018 01:09:13 GMT
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Link is valid.