: Likely the fourth installment or segment of a specific series. : The video resolution (Standard High Definition).

: This could refer to any number of live events, such as concerts, sports events, or TV show recordings. Without more specific information, it's challenging to determine which event you're referring to.

: A specific internal release tag used by digital distributors or encoders.

: Likely a specific "release group" or version tag from the original uploader.