I've been having some odd issues with youtube.com, chrome on Windows and SSL decryption. 

 

Pages would hang, partially load, or load slowly, Videos are slow to load, and clicking on links would not work. Embedded videos are fine.

 

I narrowed it down to a chrome/Windows combo, and that it appears to be related to SSL decryption. No problems on IE/Edge on Windows, no problems on non-Windows devices.

 

QUIC is blocked at the firewall and disabled in chrome.

 

I've added www.youtube.com to my CN exclusions for SSL decrypt and it fixes it.

 

So I'm assuming google are doing some sort of new non-standard certificate pinning/validation with chrome (to youtube content).

 

Has anyone else seen such oddities?