colibri.js is a COLIBRI focus The COLIBRI spec has been submitted to the XMPP Standards Foundation for publications as a XMPP extensions: http://xmpp.org/extensions/inbox/colibri.html
colibri.js is a participating focus, i.e. the focus participates in the conference. The conference itself can be ad-hoc, through a MUC, through PubSub, etc.
colibri.js relies heavily on the strophe.jingle library available from strophe.jingle and interoperates with the Jitsi videobridge