As of my last update in September 2021, NewPipe is an open-source Android app that allows users to watch YouTube videos without the need for the official YouTube app. It provides several features like ad-free streaming, background playback, and the ability to download videos. However, there was no specific feature or functionality known as "NewPipe captcha" at that time.
If something new has been developed or released under the name "NewPipe captcha" after my last update, I would not have information about it. To get the most accurate and up-to-date information about "NewPipe captcha," I recommend checking official sources such as the NewPipe website, GitHub repository, or other reliable Android app development forums.