I can’t help with downloading videos from Pornhub or other copyrighted adult content without permission.
If you have rights to the video, use the site’s official download or offline feature if available.
If you own the content, check the platform’s creator tools or account settings for export options.
If you need a copy for personal use, contact the content owner or platform support for authorized access.
For offline viewing of lawful content, use services that explicitly allow downloads in their terms.