Tod Browning’s 1932 classic, Freaks, is apparently in the public domain and available for download at Archive.Org. This movie was considered so far out on the edge for its time that it ruined Browning’s career, led to a financial disaster for Universal, and was banned in the UK until the 1960s.
Sadly, the original version was received so negatively by test screen audiences that Universal ordered a recut that resulted in over 30 minutes of Browning’s original footage being removed; that footage is still lost.