The main announcer on that Flo clip sounds like Brett Lee, but I don't have coverage so I'm not sure. There are only a handful of announcers that cover US based cycling races, so you will hear their voices often.
Quinn had some good competition, but wound up crushing them at the end. One might wonder why he would work so hard for yet another jersey he has already won twice. It's more than palmares, he gets to (actually, is required to) wear it in any UCI road race until next year's championships, unless he achieves the leadership position in any race-based jersey competition (leader, points, mountains, etc.).