=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Content-Type: text/html; charset=utf-8
Location: https://developers.google.com/youtube/documentation
Cache-Control: no-cache, must-revalidate
Pragma: no-cache
Set-Cookie: _ga_devsite=GA1.3.2853983449.1638137921; Expires=Tue, 28-Nov-2023 22:18:41 GMT; Max-Age=63072000; Path=/
Content-Security-Policy: base-uri 'self'; object-src 'none'; script-src 'strict-dynamic' 'unsafe-inline' https: http: 'nonce-z7dYvm1uIga7uMvgezfJ6//eyK4Ako' 'unsafe-eval'; report-uri https://csp.withgoogle.com/csp/devsite/v2
Strict-Transport-Security: max-age=63072000; includeSubdomains; preload
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 0
X-Content-Type-Options: nosniff
Expires: Fri, 01 Jan 1990 00:00:00 GMT
X-Cloud-Trace-Context: b1a6b003198e86ca3f5158b002c87261
Content-Length: 251
Date: Sun, 28 Nov 2021 22:18:41 GMT
Server: Google Frontend
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Connection: close

HTTP/1.1 200 OK
Last-Modified: Tue, 11 Jun 2019 23:40:45 GMT
Content-Type: text/html; charset=utf-8
Set-Cookie: _ga_devsite=GA1.3.1817729095.1638137921; Expires=Tue, 28-Nov-2023 22:18:41 GMT; Max-Age=63072000; Path=/
Content-Security-Policy: base-uri 'self'; object-src 'none'; script-src 'strict-dynamic' 'unsafe-inline' https: http: 'nonce-i9Af1ZhWsK1NQAOv3NzUf5IAaWuEoG' 'unsafe-eval'; report-uri https://csp.withgoogle.com/csp/devsite/v2
Strict-Transport-Security: max-age=63072000; includeSubdomains; preload
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 0
X-Content-Type-Options: nosniff
Cache-Control: no-cache, must-revalidate
Expires: 0
Pragma: no-cache
X-Cloud-Trace-Context: fa6b2dd5beef50f6613ce4b759ce4848
Content-Length: 44475
Date: Sun, 28 Nov 2021 22:18:41 GMT
Server: Google Frontend
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Connection: close

Request headers
================
HEAD /youtube/documentation HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: developers.google.com
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.