On other website in search engine there is option you can choose beign filmed. Personally I don't think if you would have much luck with finding one. Escorts have their private lifes and I dont think they would risk finding your personal porn on the internet or somewhere else. The furthest I went with escort was taking photos of her (of course without taking face) maybe you'll try this instead, but I would suggest get to know escort bit more first, get her trust. Anyway good luck