Re: Chris Smoove
The bigger Call of Duty commentators do YouTube full-time, such as Hutch, Seananners, xJawz, Wings Of Redemption (who is a dick), Woodysgamertag and plenty more.
Most if not all of the 2K commentators just do it in their spare time and work 9-5 jobs.
No idea if Smoove does it full-time though. He has enough views and subs to be able to if he wanted.