The videos that we see on YouTube activate enter code are generally uploaded by people whom we call Youtube.com/activate. The videos can be from any domain, be it entertainment, science, education, health & fitness, or business. Currently, T-Series holds the number one position in hosting a maximum number of subscribers, followed by YouTube Movies, YouTube Music, and PewDiePie.

Sign in to your YouTube account and find the settings option there.
A window will appear showing the activation code.
Now, launch the site youtube.com/activate from another system.
Mention your login credentials.
On the next screen, enter the code that you got before.
Move ahead by tapping on ”Allow access.”
Activation will successfully complete.