(one word, capital O, H, and the rest lowercase, no space)

So a proper formatted version would be: Or in a filename: The.Bay.S03E02.720p.OpenH264.WEB-DL.mkv Note: OpenH264 is Cisco’s open-source H.264 video codec.

The proper text for that query depends on the context, but if you're looking for a or search term related to video encoding:

If you mean the used in the scene release, it’s typically written as:

(or .mp4 )