Now this was very interesting IMO and also reading about the socalled Super Cookies ( see links below ). WebRTC that's briefly mentioned in the video is one way users could be tracked but it's also Always Always recommended blocking WebRTC especially when using VPN as otherwise your real local IP will leak. Simply protected by installing an addon in your browser. IE is not effected.
Test : IP/DNS Detect
FF : WebRTC Control
Opera : WebRTC Control
Crome : Not tested as I don't have it and it seams the addons that's available got bad reviews.
Sniffly Demo : https://zyan.scripts.mit.edu/sniffly/ Firefox/Chrome/Opera with HTTPS Everywhere disabled. If you use an ad blocker, a bunch of advertising domains will probably show up in the "Probably Visited" column (ignore them). I ignore victoriasecret.
Unpatched browser weaknesses can be exploited to track millions of Web users
Browsing in privacy mode? Super Cookies can track you anyway
