It would be cool if you checked if you recognized the gal in this video. She is a twentysomething, caucasian woman with dark blonde, shoulder length hair and a slightly upturned nose. In this particular ~7 minute video, she kneels with her rear in the air and her face on the floor. Here is another. She has published a number of other farting videos. I think on manyvids, but possibly on clips4sale.
Thanks for considering