Ok, first off, it's very doubtful that Craig can aquire the money to buy Screwattack and, by extension, Death Battle from WBD and Rooster Teeth in time before the brand liquidates.
Second, the guy, from former employee's words, was a terrible boss and pushed Ben to do things in Death Battle that held it back/made more issues for the show. Why would Ben want to work with him again?
Thirdly, his current channel doesn't have the ad revenue to acquire the webshow. He would need to fund a kickstarter with a stretch goal in the millions to aquire it and even then, that is a pipe dream.
At this point, Craig is talking out his ass