to a smaller size (like for mobile-only viewing).

Not everyone has fiber internet. A 617 MB file is small enough to download in minutes on a standard connection and won't trigger data caps as quickly as a 4GB "Ultra HD" file would. 3. Energy and hardware efficiency

(if the file is stuttering or won't open).

Here is why this "middle-weight" file size is the unsung hero of the digital video world. The technical breakdown

In an era of 4K displays and gigabit internet, seeing a file labeled might feel like a blast from the past. However, this specific configuration remains one of the most popular formats for digital archivists and casual viewers alike.

(if you're trying to find where this specific file naming convention comes from).