O.k. this one is from a long time ago. I mean a really long time ago, like before ads were on Youtube and Youtube didn't mind porn previews on their site so much. If I'm remembering the preview correctly, it starts off with two lesbian dominatrices celebrating something. Then one of them says she got a gift for her lover. They walk over to a cage that is covered by a red cloth. When the cloth is removed, it is revealed that there is a bound and ballgagged girl in a white tank top and wearing white panties in the cage. They two dominatrices then force the bound girl to crawl of the cage with some type of cattle prod. I'm pretty sure the movie was by Kink. Ring any bells to anyone.