Hi all
For live streaming and recordings, please think about licenses. The presenter has to agree to put his/her talk under a free license. Sadly, most of the videos from Buenos Aires we have on commons are technically copyright violations, because the presenter's consent is missing.
I highly recommend to require all presenters to explicitly state the license of papers, slides, and the presentation itself. For the Developers' Workshop I'm organizing in April, I made this question part of the registration form. I recommend to do the same for Wikimania.
Thanks, Daniel