A 1954 episode of Milton Berle's "The Buick-Berle Show", a variety series. In this episode, we have a sketche mocking canned laughter, Milton meeting a wacky teenager, a interestingly dated dancing sequence, scenes with Milton pretending to break his leg, and a special name-dropping opening song about television. Picture quality is bad. Obviously Buick's attempt at aiming at a well-endowed television audience. The series aired on NBC and was live, something mentioned in the show itself.
You can stream 1954 TV Episode - "The Buick Berle Show'' with guest Mickey Rooney (1954) free and legally on alltube, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.