"AMKF" might be the name of the group that ripped/encoded the video, and "Legacy" is the actual show title.
Sometimes these tags are used for specific fan-subbed anime or regional shows that aren't indexed under their English names. legacy-amkf s05e03-720p-web43:29 Min
That specific string looks like a file name for a digital video, but "legacy-amkf" isn't a standard TV show title. It is most likely a or a shorthand used by encoding groups. "AMKF" might be the name of the group
To help me create the right content for you (like a summary, a review, or a discussion post), could you clarify or what the full title is ? or a discussion post)
Based on the format, this could refer to a couple of different things: