NedX is a Chrome extension that allows users to easily collect evidence of negative comments and download them as PDFs. With NedX, you can navigate to YouTube, log in to the extension, and click the "Capture" button to create a capture button for each comment. When you encounter a negative comment, simply click the capture button to collect the evidence automatically.

One of the key features of NedX is the ability to track your response efforts. You can view your response status and see how the negative comments are being handled. This gives you a clear overview of your progress in dealing with the comments.