City Lights is a silent 1931 Charlie Chaplin film. Sound film was a growing trend, but Chaplin stuck with silents for years afterwards. I watched it on HBO Max. Our ridiculous copyright laws explain why this 91-year old film is not more freely available. I blame Sonny Bono and Disney.
Criterion calls it "the most cherished film by Charlie Chaplin". Deep Focus Review has an interesting article on Chaplin's career and this film in particular. Roger Ebert opens his review with this: "If only one of Charles Chaplin's films could be preserved, “City Lights” (1931) would come the closest to representing all the different notes of his genius." Rotten Tomatoes has a critics consensus score of 97%. It's included in the book 1,001 Movies You Must See Before You Die.