Well, there are going to be some problems coming with the video taping in public. When in public one has no "right to privacy" and therefore their image can be captured and used without release. This is how news reporters, sporting events etc can function. Without that law a tv station would have to get signed releases from every spectator at any event before they could broadcast the event.
Now this video is akin to the upskirt videos that have been all the rage lately and those caught taking those types of videos have been successfully prosecuted. Now by his own evidence he wasn't shooting her entire routine, he was just shooting her ass. Yes it is pervy.
Now for the cyclist, was he in the right? Hell yes. Was he in the wrong legally? Hell yes. But this is a perfect case of just because something is legal, doesn't make it right and just because something is illegal, doesn't make it wrong.
Let's hope that if a cop had been summoned, he'd do what was right, not what was legal......