Likely 1080p (Full HD), the standard for mid-2017 digital exports.
Utilizing the "Secret Admirer" trope, the film likely balances the line between romantic intrigue and the slight unease of being watched. 2017.09.13 Secret Admirer.mp4
As a piece from 2017, it may feature era-specific technology (e.g., iPhone 7/8 era, specific social media interfaces) that grounds the "secret" communication in a specific digital moment. Likely 1080p (Full HD), the standard for mid-2017