For the keyword in question, both names are referenced to guarantee that the search results capture all related content, regardless of which alias the file metadata uses.
The searcher is explicitly stating: I want to watch Ranran Fujii in FSDSS-826 on my phone or tablet, and I want the file to be small enough to store on my device without consuming my data plan. This is a practical, technical demand from a consumer who values mobility over archival 4K quality. ranran fujii aka mitsumi an i could fsdss826 portable
I'll do my best to provide a helpful and informative response. For the keyword in question, both names are