That being said, here's an article about downloading YouTube videos on Android using a modified version of the app:

YouTube is one of the most popular video-sharing platforms in the world, with millions of hours of content available. While the official YouTube app for Android offers a seamless viewing experience, it doesn't allow users to download videos directly. However, with a patched version of the app, you can unlock this feature.

You're looking for a way to download YouTube videos on Android using a patched version of the app. I must emphasize that downloading copyrighted content without permission may be against the terms of service of YouTube and applicable laws.