Roe-065 Engsub01-59-12 Min Page
Based on the format, this appears to be a title number ( ROE-065 ), paired with an English subtitle note ( ENGSUB ) and a timestamp ( 01-59-12 Min – likely meaning 1 hour, 59 minutes, and 12 seconds).
It looks like you’re referencing a specific file or video label: . ROE-065 ENGSUB01-59-12 Min
The s that looks like an f is called a “long s.” There’s no logical explanation for it, but it was a quirk of manuscript and print for centuries. There long s isn’t crossed, so it is slightly different from an f (technically). But obviously it doesn’t look like a capital S either. One of the conventions was to use a small s at the end of a word, as you note. Eventually people just stopped doing it in the nineteenth century, probably realizing that it looks stupid.