One of these is El Cantante, which opens with the character played by J-Lo being interviewed about her marriage to the character played by Marc Anthony. The rest of the movie is a conventional biopic, with occasional returns to the framing interview.
Woody Allen’s Bananas (one of his “earlier, funnier” movies) featured ABC’s Wide World of Sports covering an assassination in a Latin American country, including an interview of the dead Presidente by Howard Cosell.
Very fascinating answer, because it seemed like it wasn’t part of the movie, but as documentary segments added on later… I think this was a very wise thing to do. It gave the movie legitimacy, context, and another layer so that when you do see John Reed, Emma Goldman, etc., you have a better understanding for what drives them.
Leaving Las Vegas Elisabeth Shue’s character is speaking to someone in an interview situation for exposition, though I don’t think it’s ever clarified who it is.
Another Woody Allen example: To Rome With Love. A middle-class office worker wakes up one morning to discover he’s somehow become a national celebrity and is invited onto TV talk shows to answer questions about what he had for breakfast, whether he thinks it will rain, etc…
When Harry Met Sally has mock interviews with random older couples, who never appear anywhere else in the film, describing how they met interspersed throughout the film.
And another Woody Allen example, his mockumentary “Zelig.” Many people, some of whom are real people “acting,” but as themselves, reminiscing about the fictional title character.
I’ve always found this movie hilarious. Others find it boring. One of my favorite lines from an “interview” (paraphrased): “Cole Porter was especially fascinated by him. He even started writing a song, ‘You’re the Top. You’re Leonard Zelig.’ But then he couldn’t think of anything that rhymed with Zelig.”
Young Winston has a couple of scenes of Winston Churchill and Jennie Spencer-Churchill being interviewed by and offscreen reporter.
Mr. & Mrs. Smith has Brad and Angelina’s characters being interviewed by a marriage counselor.
Unforgiven has a dime-novelist attempting to interview various gunfighters, none of whom are interested.(Except Richard Harris’ character, but he doesn’t last long.)
In The Electric Horseman Jane Fonda’s character interviews Willie Nelson and Valerie Perrine, then has an interesting method of getting an interview out of Robert Redford.
Superman (1978) – Lois Lane interviews Supes after her editor Perry White (Jackie Cooper) says it’ll be “…the single most important interview since… God talked to Moses!”
Blade Runner (1982) – The opening interview with Leon (Brion James) does not go well for the interviewer.
Gremlins 2: A New Batch (1990) – The leader of the gremlins is interviewed by a dude in Grampa Munster make-up.
Deadpool 2 (2018) – Deadpool interviews potential team members.