Actually i just watch the politic of youtube and there only 2 reason why burnt get his account delete.
First one his about music copyright, sometime burnt put music on his video, music he dint make himself and it's not something we can do, so he probably get some notice of it and did nothing so they finnally close the account.
The second one is about Archer, he probably send a complaint to blizzard directly with all the details about our server on youtube, and blizzard ask youtube to close that account because they just dont like warcraft II anymore.
Maybe you guys should know blizzard dont want to see warcraft II aymore since they made world of warcraft because it's not the same history, so they really try to forget about warcraft II.
This is why Warcraft I and warcraft II are the only games blizzard dont sell anymore.