Because this file name is highly specific, it is impossible to create a "proper article" with context (such as plot, content, or origin) without further information. Files with this structure are frequently found in:
is the content of the video? (e.g., Is it an anime episode, a video game, or something else?) Once I have this, I can tell you exactly what it is.
Likely indicates episode 70, part 70, or a video within a series.
did you see this file name (e.g., a specific website, forum, or file list)?
To get a proper article, the context of where this file was found is required.