Edens_zero_21_pro_acb.mkv

The filename likely refers to a high-quality video file of Episode 21 of the anime Edens Zero . In this episode, titled "Reset," the crew faces a betrayal in the Labor District of the planet Sun Jewel. Episode 21 Summary: "Reset"

Shiki and Homura are forced into a fight with a massive ore creature called Black Rock. Rebecca and the rest of the crew arrive to assist, using concentrated firepower and Shiki's gravity powers to defeat it. Edens_Zero_21_Pro_ACB.mkv

This episode concludes a major portion of the with the following key events: The filename likely refers to a high-quality video

Likely a shorthand for the release group's name or a specific audio/video codec configuration used for that file. Rebecca and the rest of the crew arrive

Often indicates a "Professional" or "Premium" encode, sometimes associated with specific release groups that prioritize high-bitrate video.

A common multimedia container format (Matroska) that supports multiple audio tracks and subtitle streams.

The terms in your filename typically provide technical context used by fansubbing or encoding groups: Refers to the episode number.