In this video tutorial i am explaining How to add YouTube featured channels in your channel Page. Its Very Simple and easiest way to add.
By using simple step.
Login your YouTube Studio and go to Customize Channel.
Then Right Side Channel customization
Featured sections
Add Section
Search & Add channels
After that your can go to Privacy Setting in YouTube Page
Playlists and subscriptions
Disable Keep all my saved playlists private
After Refreshing Your YouTube Page it will be effective.