To be fair, Best of Steam Greenlight is not criticism. It's comedy. It's pisstaking. I'm not saying that justifies abuse of Youtube's system, but when your content consists of taking the piss out of someone else's work without any constructive analysis, then I feel it would be best to be a bit more mild about potential backlash, kind of like what Retsupurae does with their content (they take it down themselves immediately if the target objects to it).
Fair point, but Kobra did not behave in a manner that could be truthfully said to be "mild"; as the episode made clear, a copyright takedown is a unilateral action with serious consequences for the channel that it is used against - three strikes and the channel will be completely deleted.
The channel has no defense, other than to I) file a counter-claim and hope that Youtube bureaucracy finds in its favour, II) fight it in court or III) lay back and take it, always mindful that it only has to happen two more times before it's curtains. Only this time, Jim decided to take the fourth option: mobilize outrage at the grassroots level in order to expose Kobra's own wrongdoing, and to shame it into backing down.
It's the nuclear option, basically, and once Kobra decided to exercise it, it'd better be prepared for the fallout.