Is it that it will never be available, or not available yet?
If you need to be assured that it's the same talk, here's a live blog from sus2012 http://backspac.es/r/Xx8736cUap
Partners at VC funds are employed (funded) by limited partners (LPs). LPs are typically institutional cash and tend to be conservative. A26Z's LPs and potential LPs would not be pleased if they saw a video of Ben giving a talk wearing his "No Bitch Ass Ness" t-shirt.