usr does mean user. It was the place for user managed stuff originally. The home directory used to be a sub directory of the usr directory.

The meaning and purpose of unix directories has very organically evolved. Heck, it’s still evolving. For example, the new .config directory in the home directory.

Why so many? Its resolution is 16000 x 16000 which is a lot but also not that much. Is it doing more than just video output?