JustSomeGermanDude
Experted expert in expertness.
For what reason? If it's in the video people will see it, and they don't need to be convinced to watch the video cause they're already on the playlist; in fact: the only thing keeping them from watching the video at this point is the introduction...I would rarely use that feature myself. One application would be to let people know about an exciting point in the upcoming video that isn't mentioned in the title.