Yes my best guess the ad was using someone's else clip, maybe from OF or lower amateur content. Been looking for keywords for quite a while with no luck so far. Hopefully in time someone will recognize it. thanks for your advices!
I also found that picture from side. The quality of the first one makes me think it might be from a photo shoot though, video would be more blurry I guess. Her tumblr and twitter date back to 2011 so maybe there's something there