The Internet Archive is a non-profit digital library. It legally hosts:
The Internet Archive operates a program known as Controlled Digital Lending. Under this system, the Archive digitizes physical copies of books and media that it owns and lends them out to one user at a time. If the Archive owns a physical DVD of Harry Potter and the Prisoner of Azkaban , it may allow a user to digitally "borrow" that film for a limited period, during which the file is encrypted to prevent unauthorized copying. The Legal Reality: Copyright and Takedowns Harry Potter Movies Internet Archive