The Criterion Channel is a great source for movies, especially older classics. The Criterion Collection serves to restore and distribute "important classic and contemporary films", so it has been a go-to for many film scholars and cinephiles. As the channel restores these films, many of them get letterboxed, which involves them altering the film for viewing while keeping its original aspect ratio.
Source：https://www.cbr.com/best-movies-streaming-on-the-criterion-channel/
