Nice video but wrong title. How does it work? Who signs what? Where's the key go? What's a DS? Probably should be retitled as dnssec attack mitigation..
With all the problems with DNS, they build a new DNS without looking & mitigate all the security holes in the old one first, authentication is not security, it's part of the security.
Should be titled, "DNSSEC and amplification attacks". This video does not explain how DNSSEC works.
@klasesalk