Pornhub only allows uploads from verified users. You have to upload your ID to the verification service run by yoti.com before you can upload videos.
This has been the case for over a year https://cdn.arstechnica.net/wp-content/uploads/2021/02/Pornh...
Also FWIW they also allow non-porn content. For example https://www.pornhub.com/view_video.php?viewkey=ph604a53bb0c9... And as you can see, it gets a plenty of views.