more tech help

I want to download something form youtube (me being interviewed back in 2013) and edit it so that I can put a short extract somewhere. Anyone know how to get the damn thing off of youtube?
Conquer Club, a free online multiplayer variation of a popular world domination board game.
http://www.tools.conquerclub.com/forum/
http://www.tools.conquerclub.com/forum/viewtopic.php?f=8&t=236333