Posting Video from Library Conferences?

Follow-up from the previous "TED and Charlie" post:
Is anyone posting videos of the programs being done at library and related conferences?
A cursory search revealed only a handful of videos at www.webjunction.org

This seems like a no-brainer and as such perhaps it's already being done -but if it isn't, shouldn't we be doing this? As librarians we are all about sharing information (dare I say it's our reason for being!) and capturing and posting this valuable content should be relatively easy.

Does anyone have any insight into any organizations/conferences that might be doing this or will be doing it in the near future? A lot of librarians would love to be able to have access to the great programs being given, but the cost of attending a conference is prohibitive.

Any thoughts on why this shouldn't be done? I guess one might argue that posting programs could cannibalize conference revenue and attendance, but it seems to me the net benefit from distributing this information would be greater.