This is the "magic" of modern video. High-Efficiency Video Coding (HEVC) is the successor to the older x264 standard. It allows for roughly 50% better data compression at the same level of video quality.

To understand why this specific version is popular among collectors, we need to look at the individual components of the technical string:

While 1080p and 4K are available, 720p remains a "sweet spot" for many. It provides a significant jump in clarity over standard definition (480p) while keeping file sizes manageable. On tablets and standard laptops, the difference between 720p and 1080p is often negligible.