720p is considered "Standard HD." It strikes a balance between visual quality and smaller file sizes, making it ideal for mobile viewing or older hardware.
The filename is a generic name typically generated by web browsers or download managers when a file named "720.mp4" already exists in your downloads folder. The "720" likely refers to the 720p HD resolution ( pixels) of the video. 720(1).mp4
For a visual example of how these generic filenames appear in video collections, you can view this clip: 720 (3).mp4 — Видео от Ванитас Принц Яндекс• Feb 26, 2026 Hard Zone (MTV Russia, 2000-2001) - Full Episodes 720p is considered "Standard HD