Given the components, the most plausible interpretation is that this string is a used in a non-public or semi-public media indexing system. Specifically:
To understand the write-up, we must deconstruct the string into its individual components: sone340rmjavhdtoday015909 min best
This indicates a specific time-stamped release or a duration (often interpreted as 1 hour, 59 minutes, and 09 seconds) that was updated or trending "today." Given the components, the most plausible interpretation is
: Strings like this are frequently used on forum-based sites or media repositories. You may have better luck searching for the first half of the string on platforms dedicated to specialized media archives. Given the components