It looks like is a specific local file on your computer, likely a screen recording or a video exported from an Apple device (given the "-mac" suffix). Because this file isn't publicly available on the web, I can't see the video myself to tell you exactly what’s in it.
Is it a , like a music video or a short film? Abbie_2_Clip_1-mac.mp4
Many Mac users create these clips using QuickTime or Command-Shift-5 to show someone how to do something. If "Abbie" is a colleague or a student, this 15-to-30-second clip might be a digital tutorial. It’s an "interesting" artifact of modern communication: instead of writing a long email, we simply record our screens and send the MP4. It looks like is a specific local file
However, based on the filename and common Mac file naming conventions, this clip likely falls into one of three "interesting" categories. Here is a write-up exploring what that video might represent: 1. The "Found Footage" Aesthetic Many Mac users create these clips using QuickTime