I can recommend this Japanese movie by Junta Yamaguchi. It's about a man who lives above a small cafe and discovers a computer monitor in his room and the monitor in the cafe downstairs are connected like a video call except the one upstairs shows events from 2 minutes in the future and the one downstairs shows 2 minutes in the past. He spends some time running up and down the stairs asking and answering his own questions and then his friends come over and one has the bright idea to point the monitors at each other. This generates an infinite number of images extending farther into the future and hijinks ensue.
I dislike most time travel movies but unlike every other dystopic plot this one keeps it lighthearted and didn't leave me feeling irritated.
Also the entire movie is filmed in a single shot.