The FOSDEM web site includes a synopsis of this talk , along with the video, slides (PDF)  and a "demo screencast" (MP4/video) .
It's a good talk and WireGuard is quite interesting. IPSec, OpenVPN, et al., are great but I definitely think there's a need for a high-performance, high-security, easy to configure VPN.
The demo is only two and a half minutes long, check it out.
Edit: Also found zx2c4's technical whitepaper, "WireGuard: Next Generation Kernel Network Tunnel". Just started to look over it but it appears to have all the juicy details.