machinimating 

The act of creating a piece of machinima

Burnie was machinimating for those guys. What quality work!

machinimating by Paul Conley February 3, 2007

Machinimatographer 

Alternative to machinimator most often used by Second Life film makers.
Derived from Machinima and cinematography
A person who makes machinima movies.

Insertyourownnamehere is such a wonderful machinimatographer, she has won many awards and has many fans.

Machinimatographer by kerfoofle November 8, 2010