Quote Originally Posted by Mandy
Not "cozy" but "a heart-warming film" sounds better. Cozy is for a cozy home, a cozy fire etc.
(1) I completely agree with Mandy's recommendation of "heartwarming";

(2) I would also suggest "uplifting," if you want to emphasize that the movie inspires optimism.

(3) Although, as Mandy says, the word "cozy" doesn't quite work for films, you can suggest the idea of "уют(ный)" in a metaphoric way with a phrase such as "this movie is cinematic comfort food."

(Note that "comfort food" is a fixed expression in itself, and if you Google for the three-word string "cinematic comfort food," you'll see that it's quite a cliche in movie reviews.)