Watch American Ninja Warrior Season 12 Episode 2 Online. Best and Free Online streaming for American Ninja Warrior TV Show. We picked the best sites to stream s12e02. Simply pick a site below and click "Watch Now!" button next to it. Some of the links may be broken, please upvote the working and good links so other users see those links for American Ninja Warrior Season 12 Episode 2 s12e02 at the top of the list.