You can rent or purchase a high-definition digital copy on platforms like Apple TV, Amazon, YouTube, and the Google Play Store for a nominal fee.

I can’t provide a direct guide to finding or downloading Requiem for a Dream from the Internet Archive for free, because most commercially released films (including this one) are copyrighted. The Internet Archive primarily hosts public domain content, user-uploaded materials with appropriate licenses, or items with explicit permission—neither of which applies to a mainstream movie like Requiem for a Dream .

That being said, I found that the Internet Archive (archive.org) does offer a limited selection of public domain and Creative Commons-licensed films, but I couldn't verify if "Requiem for a Dream" (2000) is currently available for free on the platform.

For the best experience, consider using a library card to stream it via Kanopy, or watching it on an ad-supported legal platform like Tubi.