Here’s a useful, straight-to-the-point breakdown of what that phrase actually means, what to expect from such files, and important considerations before downloading or playing them.
The "2CX" methodology may soon be automated by AI encoders that analyze human visual attention—applying maximum data only to the parts of the frame you actually look at (foveated encoding). When that happens, "Extra Quality" will no longer mean massive file sizes, but rather smart quality. hd movie 2cx extra quality