The resolution. It’s "High Definition," but on the lower end compared to 1080p or 4K. It looks great on a phone or tablet, but might look a bit soft on a giant 4K TV.
In short, this file represents a very specific era of a movie's lifecycle—the moment it leaks in decent quality just before the official digital or physical home media release. The resolution
The compression codec. It’s the industry standard for shrinking movie files down to a manageable size without losing too much visual detail. The resolution. It’s "High Definition