A wide variety of video material distributed by the Chaos Computer Club. This feed contains all events from 33c3 as mp3
https://media.ccc.de/c/33c3
The Zcash anonymous cryptocurrency (33c3)
Zcash is the third iteration of an extension to the Bitcoin protocol that provides true untraceability, i.e. fully anonymous transactions. It is arguably the first serious attempt to establish this extension, in the form of its own blockchain, beyond the form of an academic proposal. The talk provides an introduction to the magic that makes it work. about this event: https://fahrplan.events.ccc.de/congress/2016/Fahrplan/events/8330.html