Todd Spangler NY Digital EditorYouTube is launching four originals timed for the 2020 Tokyo Summer Olympic Games, hoping to get in on the action for the global sporting event of the summer.The nonfiction programming from the Google-owned video giant features American gymnast Gabby Douglas, who was the 2012 Olympic all-around champion, and The Try Guys — Keith Habersberger, Ned Fulmer, Zach Kornfeld and Eugene Lee Yang — the comedy foursome and YouTube stars who launched their careers at