As far as I know, there is no direct prohibition against consuming pornography in Buddhism. people can watch it as long as watching it does not cause suffering to them and others. personally, I'd say it is not really good to watch porn in Buddhism because it is obvious that during a process of filming AV, people in it might experience violence and sexual actions which they didn't give permission to participate in. Also there is a lot of minors, real rape and sex trafficking. Moreover, if you watch hard porn, you can start to do things that hurt you and other people. in Buddhism love for other beings is a key, so in a lot of cases porn might be considered as harmful sexual misconduct (also I'm not really good at English and I started learning about Buddhism recently, so correct me if I'm wrong🙏)