DDoS-Guard is a Russian Internet infrastructure company which provides DDoS protection, content delivery network services, and web hosting services.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
A modest JavaScript framework for the HTML you already have.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.