Because it is so efficient, a movie file that might have been 4GB in the past can now be compressed down to 1GB or less without a noticeable loss in clarity.

264 and H.265 or focus more on on different devices?

Choosing 720p HEVC provides the "Goldilocks" experience: it's "just right." You get high-definition clarity that looks sharp on modern screens, but the file remains small enough to download in minutes or store by the hundreds on a single external drive. Understanding the MKV Container

The Evolution of Efficient Streaming: Why HEVC and 720p are the Sweet Spot for Modern Viewers

While "4K" and "8K" dominate tech headlines, remains the unsung hero for the average user. On a standard tablet, laptop, or mid-sized smartphone, the difference between 720p and 1080p is often indistinguishable to the naked eye.