There is a jap site called di.g3Tchu (cipher: 3->e, T-t, i->l) that let's you download porn after you pay for it. It doesn't seem that technically advanced, especially after trying to unzip the video I bought with their shitty jap extractor tool, explzh, and it runs on PHP. I inspected the site with dev tools and there was a direct download link, albeit not to an mp4.
E.g. https://di.g3Tchu.com/mypage/download.php?did=4988802 was the download link
And blob:">https://di.g3eTchu.com/ was where I could watch the video from in my browser
Is it possible to download videos for free from this site? What do I need to look for? I saw them using sessions from the storage in dev tools