YouTube Vanced allows you to watch YouTube videos without getting interrupted by ads. You'll still be able to enjoy extra features such as PiP (Picture in Picture) mode.
Functions of the APK include the ability to block ads, listen to videos in the background, repeat videos, use the PiP mode, change the image resolution, etc.
The APK can be used on both rooted and non-rooted devices. However, if you install it on non-rooted devices, you'll need to download the additional MicroG file which will allow you to log in using your Google account.
No age restrictions. However, adult supervision is recommended for underage users.