No, noone gets punished for making false DMCA claims, plenty get punished as a result of those claims.
The only way you could actually claim a copyright violation is if you provide LDD files and specifically license them for non-commercial use (which some members seem to have done so some copyright may actually be involved, sorry hadn't got through the entire thread), but even then the model is not protected, someone else could post a picture of a model and anyone is then free to recreate it (and sell it).
This is why LEGO has such problems going after Lepin, the law offers little protection.
Selling other peoples LDD files is definitely a copyright violation, I'm still not sure if the videos actually would be, I suspect its one for the lawyers which means an uncertain and costly time in court.