I was confused for a bit but it's a youtube video not running in engine... you can understand how I'd be confused as unity has a web player.
Edit: Apparently they don't really have the web player anymore. Still confusing. Was actually hoping that for once I'd be proved wrong about WebGL / encriptem.
It is still possible to export to e.g. WebGL, but the features required for something like this is not available in the browser. Also they were running on 3x Titan X, which doesn't exactly have widespread adoption :)
Edit: Apparently they don't really have the web player anymore. Still confusing. Was actually hoping that for once I'd be proved wrong about WebGL / encriptem.