I want to cite information from a live webinar. Modeling my citation after EE's QuickCheck Model for Broadcasts & Web Miscellanea, Podcasts (p. 789 of the digital edition), I come up with the following for a first reference note:
Kathy Meade, "Learn How to Trace Your Swedish Roots," 9 January 2014, live webinar, Genealogical Society of Pennsylvania.
This seems rather thin, but I'm at a loss as to what other information I can provide. Not being a member of the society, I do not know whether they have archived the webinar in their members-only section.