A is a "workhorse" file. It isn't built for beauty, but for endurance —likely containing an hour or more of footage meant to be accessible on almost any device on the planet, regardless of its age or processing power.
Sometimes, high-fidelity audio (like uncompressed PCM) is hidden inside a low-res video, ballooning the size. Converting audio to AAC (128kbps) can save 50–100 MB. 360p mp4(503.77 MB)
This size is typical for full-length feature films, long-form webinars, or recorded lectures archived in low resolution for legacy compatibility. 2. The Efficiency Gap A is a "workhorse" file