=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Date: Mon, 29 Jul 2019 01:40:16 GMT
Server: ustream/web
Set-Cookie: ab_test_1=1; expires=Sat, 03-Aug-2019 01:40:16 GMT; Max-Age=432000; path=/
Set-Cookie: ab_test_2=1; expires=Sat, 03-Aug-2019 01:40:16 GMT; Max-Age=432000; path=/
Set-Cookie: ab_test_1=1; expires=Sat, 03-Aug-2019 01:40:16 GMT; Max-Age=432000; path=/
Set-Cookie: ab_test_2=1; expires=Sat, 03-Aug-2019 01:40:16 GMT; Max-Age=432000; path=/
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
Referrer-Policy: strict-origin-when-cross-origin
X-Framework-Lang: en_US
X-Ustream-Content-Id: 95242
X-Ustream-Content-Type: channel
Cache-Control: public, max-age=240
X-RSRC: sjc-ustream-web03
Content-Type: text/html; charset=UTF-8
X-BackendOrigin: www-web-bck/sjc-ustream-web03
X-Cache-Lang: 
X-RemoteIP: 208.97.171.33
X-Mobile-Vanity: 
X-Feature-ImgMedia: 
X-Country-Code: 
X-AB-Test1: 1
X-AB-Test2: 1
X-Cache: MISS
Accept-Ranges: bytes
Connection: close
X-BackendOrigin: www.ustream.tv-bck/sjc03-web-cache05

Request headers
================
HEAD /channel/ssdp-chat HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Host: www.ustream.tv
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.