When a wizard refugee who turns out to be a grown-up Hermione Granger (under the assumed muggle name Stacy Keach) shows up at his door, Harry remembers just how much he hated this wizarding shit. In the first episode, he does all he can to make sure a magical hero journey doesn't ensue:
Think about it: How would you use low-level magical abilities in a world where you can't let anyone know you have them? You're not gonna go heal the sick and fight crime -- the best case scenario is you'd get worshiped as a god by zealots; the worst case is you'd get magicked to death by Voldemort's henchmen. No, we say Harry would do just enough magic to avoid having to ever get a day job.
This is the first of a three-episode series, and you can watch the rest here.