Could you clarify what this video is about? It might be one of a few things:

Because I don't have access to your private files or specific offline databases, I can't "watch" this video to tell you its features. However, the alphanumeric string looks very much like a unique YouTube video ID or a similar hosting tag.

If it's a tech demo, the "useful feature" might be a specific software trick or setting.

Sometimes these IDs refer to specific educational modules.