The paganini part is not played fingerstyle. As for the arpeggios before the main part, they aren't written by paganini, and they may or may not be played fingerstyle (just cause it shows the kid doing it doesn't mean they are.) The part that quotes paganini (the fifth caprice, it only quotes a very small section, though) is most certainly picked.
Anyway, as for sites that will help you play fingerstyle, try learning classical stuff. http://www.mysongbook.com/ has some stuff. http://www.guitarplaying.com has a tab search engine, you can look for classical stuff there.