: This is the "production code" or "ID." In the Japanese adult video industry, these codes are used to identify specific releases. The prefix SSNI belongs to the label S1 NO.1 STYLE , one of the most prominent producers in the industry.
: This suffix usually indicates Spanish subtitles (Español). mp4 : This is a standard digital video container format. Content Details SSNI-706-ES.mp4
: It is a compilation (Best of) release, featuring a collection of her most popular scenes and highlights from her career with the S1 label. : This is the "production code" or "ID
If you found this file name, it is almost certainly a pirated or re-uploaded version of this compilation featuring Yua Mikami, specifically hardcoded with Spanish subtitles for viewers in Spanish-speaking regions. 1 STYLE label or how these are structured? mp4 : This is a standard digital video container format