If you have many videos to download and are comfortable with a terminal, (a more active fork of youtube-dl) is the gold standard.
: A specialized extension for Chrome, Edge, and Firefox that detects media streams directly from the video player. How to use : Install from thisvid private video link downloader
This is the most critical warning. Some “private video downloaders” specifically target adult niche communities. Downloading private content without verification means you have no guarantee what the video contains. In many countries, possessing certain categories of private, unverified videos is a serious crime with no “I didn’t know” defense. If you have many videos to download and
: A desktop application that monitors network traffic to record video as it plays in your browser. Video Downloader - CocoCut : A desktop application that monitors network traffic
Specialized extensions can detect video streams directly from your active browser session. This is the most reliable way to handle private content because the extension inherits your login permissions.