How to change your age in YouTube
Unfortunately, at the moment in the YouTube mobile app there is no function to change the age of the account owner. Because of this, you will have to use the full version, i.e. the computer version:
1. Go to the video hosting site and click on the icon of our profile, and then go to"Settings".
2. In the "General information" section, find the "Account settings" item and open it.
3. We are moved to our Google profile page. On the "Privacy" page, go to "Personal Information".
4. Find the item "Date of birth" and click on the arrow located on the right.
5. Next to the date, you can see the pencil icon, click and go to edit.
6. We update the information and do not forget to save it.