If there was a case (doubtful there is) the promoter would need to dish out the dough to actually go to court. If he does this even a few times, hes looking at $100k+ in attorneys fees with guarantee that they'd win. As soon as the funds dry up the lawyer will drop the case, especially if it doesnt look like they could get any money out of the case. They would need to prove a specific amount of monetary damages, likely much smaller than the cost of the trial.

You probably did the best thing by taking down the video, but it is highly doubtful they would be able to successfully tale you and any other media influencers to court and come out on top.

Best legal advice I've received (besides "get it on paper") is "don't spend good money chasing bad money".