Is it permissible to download songs and watch movies for free without the owners' consent, and is this considered theft, or is it permissible to steal forbidden things even though watching and listening to them is prohibited?

Degenerate songs and movies, and watching them, are forbidden by Islamic law. Downloading forbidden materials is also forbidden due to the prohibition of watching or listening to them. One must be mindful of Allah, abandon forbidden acts, and repent sincerely, for repentance from sins and transgressions is the path to salvation and happiness in the hereafter, and one must not procrastinate in it.