Classic public domain film, digitally preserved and free to stream forever.
Unknown Island (1948) is a Technicolor adventure in which an expedition sails to a remote Pacific island rumored to harbor prehistoric creatures, and finds that the rumors are true — including a herd of living ceratosaurs and a giant ground sloth that are very much alive and very dangerous.
Starring Virginia Grey, Philip Reed, and Barton MacLane. This film is in the public domain and free to watch, download, and share.