Great video! She addresses so many important concepts. Especially the PGP analogy. Why aren't all emails automatically encrypted? Because the major operating systems haven't included it in a way that is invisible to people to use. Companies like gmail will never use PGP because they make money off scanning your emails.
Love the decentralization efforts in Dash and sharing the mining rewards. The voting mechanism is also impressive.
Instant confirmation is a big deal for adoption. Cryptocurrency will never mainstream if a retailer / customer has to wait 10 min (bitcoin) to verify the funds. At least zcash is 2.5 minutes, but still longer than credit card transactions.
As for privacy, zcash is hard to beat. Dash uses mixing which offers some privacy.