what is the point

Much better engine / smoother experience maybe?

it doesn't look smoother on this video though

If you are asking about the point of posting here; it's just informational.

If you are asking about the point of making something like this: Perhaps he just likes both franchise.

This is EXACTLY what I wanted to hear, really delighted about this.

how can I get this? :D

You need Doom 2016, it will be in Snapmap.

I'll try it if i can remove or change the screaming sound. :D