To download the YouTube app for Android, follow these steps:

1. Open your browser on your Android device.
2. Go to the Google Play Store website (play.google.com).
3. Search for "YouTube" in the search bar.
4. Select the "YouTube" app from the search results.
5. Click on the "Install" button.
6. Wait for the installation process to complete.
7. Once installed, open the YouTube app and log in with your Google account or create a new account if you haven't already.

Note: Some devices may have restrictions on downloading apps from third-party sources. If you encounter any issues during the installation process, try searching for alternative methods to download the YouTube app.