This is the most ambiguous part. Possible interpretations:

. It is a compression standard that allows for high-quality video at much smaller file sizes than the older x264 standard. It is the industry standard for 4K and high-definition digital archival. 6. The Audio: "6ch" This stands for 6-channel audio , better known as 5.1 Surround Sound

It tells you exactly what the file is, where it came from, how it was encoded, and what kind of hardware you need to play it back smoothly.