Mobizen_20191020_073455.mp4

While appears to be a standard file name for a mobile screen recording made with the Mobizen Screen Recorder on October 20, 2019, the specific content of that video is private to your device.

A clear title card: "How I used to [Task Name] back in 2019." mobizen_20191020_073455.mp4

"A literal time capsule from October 20, 2019. My home screen was a mess." While appears to be a standard file name