The basic gist of the talk was that hobbiest television fan music video editors existed long before YouTube and their history and organization reflect how they use the internet now -- which is verifiable with some simple data analysis. (NB: I used to be one myself, and in the talk I used a lot of personal examples and anonymized the rest, to protect privacy of anyone who wasn't contacted about this talk. So I'll say "we" here although I'm not practicing myself these days.)
In a quick sum of my talk: We used to do music video editing with VCRs. We existed before the internet was our main way of communicating, and we used fanzines and APAs to exchange tips and tricks (but truthfully, this was borderline before my time, although the friends who taught me all did this). We had and still have conventions at which we showed off our work, to supplement the now popular online posting mechanisms of distribution. (YouTube is not a major site for fan video editors, but another current social network tool that supports video has just become very popular among my friends who use LiveJournal for their conversations.)
Knowing the history makes for interesting cruising of the video communities on LiveJournal. The anime video makers turn out to be, for the most part, a distinct group. This isn't too surprising when you read the "about" text on one of the video community pages (slightly disguised here):
Anime "vidders" are told they may not be as comfortable here, and that VCR vidders are welcome.
One of the communities that is closely related to this one is one in which an annual face-to-face convention is discussed, started and fed by some of the older VCR editors and now pretty much populated by the non-linear digital folks, of which former VCR people are now a part. The convention-discussion community members, highlighted below in orange, are closely interconnected to the community quoted from above, which is circled in red here:
The group circled in blue is a Battlestar Galactica video group, less closely related but more so than the anime group. The closely inter-connected groups in these images are the generic discussion groups, at which the craft and technique and technical discussions occur. More specific discussion groups are generally less connected.
I made these images with prefuse, and apologies for the quality of the uploads. I'm available to talk about this stuff anytime :-)