Uh, full disclosure: a gym made this video? It is not porn. I mean, depending on your definition. I don't think that their intention was for you to wank to it, but I would be pretty fucking surprised if no one did. Just, holy wow, woman. She is gorgeous, the video is gorgeous, and just wait for the close-ups on her stomach muscles while she's upside-down.
For those of you who are wondering, this is why I do yoga. Nowhere near this level yet, but I swear to you, if and when I get there, you will get one of these - Violet-style (naked).