Watch Mitzukos Dream (2022) Official Trailer

Jun: You sleep too much. You spend half your life in your dreams. Mitzuko: Yeah, but sleep is wonderful. And when you're dead, you don't get to sleep ever again. Which means no more dreams. Mystery Train (Jim Jarmusch, 1989)

In "Mitzukos Dream" you watch sleeping people, each filmed for one night with a willdlife camera that reacts to movement. So only the active parts of sleep were captured on film - the moments when we dream?