Unsettling indeed... I just visited the URL you linked and it states "Manually moved to security.proxy by LIGHTSPEED\lori at 9/10/2014 10:08 AM (Embedded player allows users to view youtube via https)".

I believe the justification is technically accurate (and Google's embedded Youtube player is http only, even when searched thru https) I don't see how using https for watching Youtube could be a security risk.
posted by dserodio 3 years and 4 months ago Link

I'm thinking that it's something to do with their firewall software being unable to block websites using SSL (it sometimes returns an error rather than a block page). But this is somewhat irrelevant as they do not filter traffic from YouTube, at least I think not.
posted by TheAdamGalloway 3 years and 4 months ago Link