What Plugin is WordPress.com Using for VR?

Hey All, I am doing some research into all the VR tools that exist so far for an upcoming Wordcamp presentation and wanted to get the latest and greatest.

I know that WordPress supports VR (https://en.blog.wordpress.com/2016/12/15/introducing-vr-and-360-content-for-all-wordpress-com-sites/) with a shortcode. Is there a way to see what plugin they are using? The ones in the plugin directory are not the same (although close)

https://ww.wp.xz.cn/plugins/wp-vr-view/
https://ww.wp.xz.cn/plugins/vr-views/

It would be great to hear of any others besides this that y’all know of as well. 🙂