Let me structure the response by first addressing legal alternatives, then explaining the risks of piracy, and perhaps providing some information on where to purchase or rent the movie. Also, I can guide them on converting a legally purchased copy if they want to save it in a specific resolution.
Another angle: checking torrent sites for legal torrents? No, that's still piracy. Maybe suggesting open-source or public domain content isn't applicable here since Interstellar isn't in the public domain yet. download interstellar 2014 hindieng 480 link
I should also consider the aspect of download quality. 480p is considered SD now, but maybe they need it for a specific purpose. If the movie is available on a streaming service, they could use the service's own download feature if it's allowed. However, not all services allow offline downloads. For example, YouTube might have user-uploaded content with the movie, but that's still piracy. Let me structure the response by first addressing
Alternatively, if they have a physical copy, converting it to digital is another option. They might need software like HandBrake to convert a DVD or Blu-ray. But purchasing the movie legally would be the best route. No, that's still piracy