what is this version of mugen?

[https://www.facebook.com/statege.statege.1/videos/629988201004033](https://www.facebook.com/statege.statege.1/videos/629988201004033)

I saw this video a while ago and I don't know what version of mugen it is or what it is.

does anyone know what this version of mugen is?

Does anyone know how movements like those are created?