The name "Oonishi" (often spelled ) is a common Japanese surname, and "Anna" is a common given name. It is possible this refers to a personal file, a niche social media post, or a specific individual in a local context. Potential Contexts
(e.g., a specific website, a file folder, or a social media link)
There are various individuals named Anna Onishi on platforms like Instagram or TikTok. If the "(2)" refers to a second part of a video series, it is likely hosted on one of these creator-driven platforms.
The suffix .mp4 and the numbering (2) are common for supplementary video materials in academic papers or conference proceedings (e.g., ACM Digital Library or IEEE Xplore). However, no current research papers under this name are widely indexed.