I do not know if it already been posted, also too lazy to search for it. But here is a clip of the creators talking about Unreal Tournament Series.
https://www.youtube.com/watch?v=gKDvqLNk7CQ
The making of UT3:
https://www.youtube.com/watch?v=61qA9mrTMCI
https://www.youtube.com/watch?v=hWgzR5uberE
https://www.youtube.com/watch?v=IElhP5O1Aa4