Whether downloading the content from Pornhub is legal or not depends on a variety of factors such as regional copyright laws, Terms & Conditions issued to users by PornHub and whether it is for personal user distribution. According to Pornhub terms, videos downloaded have to be done s using its authorized download feature (only available by registered users) and are usually for offline viewing within the platform’s app. Unauthorized downloads or third-party applications may infringe on copyright and intellectual property rights, breaking both policy and platform law.
In your personal capacity, if you have downloaded through that same site then the guidelines of Pornhub says YES. Third-party downloaders are not without their risks, though; they can break Pornhub's ToS policy and carry the risk of copyright violations for users. For instance, by not getting permission before downloading certain content you can actually face legal repercussions as copyrights are in places to protect the rights of creators and where a copyright notice is violated or abused one could be served with takedown notices or handed fines.
20-30% of adult content enthusiasts are getting unknowingly included unwitting victims as they directly seek an opt-in to a copyright violation by downloading from non-reputable sources and presumably not even aware that the practice might run afoul of laws. Cybersecurity companies Kaspersky and Norton also advise that third-party downloading tools can contain malware: 1 in 4 downloads from unofficial sources is regularily saturated with harmful software. The legal and safety implications of doing so point directly back to why you should always opt for the platform-approved methods.
Also, local laws could restrict users from downloading Pornhub content outside authorized regions. There are places like Germany and France that enforce strict copyright laws related to digital media, such as fines for illegal downloading. The GDPR, notably applicable to users in the EU is all about data privacy too so be careful — unapproved downloads breach other laws as well!
The safest bet would be getting a download from trusted sources within the platform to stay on legal side and minimize cybersecurity risks. The most safe and legal way to watch porn offline is exploring the download from Pornhub option that you can get in this platform or its app.