If it is too close to their intellectual property and you publish it on YouTube then they will have YouTube monetize it for them or take it down.

If it is too close to their intellectual property and you publish it as a professional then they will sue you.

If you have a different opinion of "too close" and enough time and money then you may sue them back.

If you publish only on the darknet or don't publish at all then they can do nothing about it.