I found an online site Matinee Classics that shows old movies, even dating back to silent movies and television shows. In addition, you can listen to old-time radio shows there. It even shows clips from the 1890’s.
Go to the home page to find Watch Videos Instantly and you can find movies and television shows alphabetized to make it easy to find. Some of the movies and televison shows may only have trailers, but they are identified.