Can you put URLs or links on the social media icons?

Yes you can, but you will have to use Youtube's built-in social media icons from your Youtube One channel.

Here is the step-by-step taken from the How to customize your Youtube One channel training page .

Add links

Next you should add links to your other social media profile and website. Again use the pen icon on the right hand side of your channel art.

To add your website click on Add under Customized Links and for your social networks click on Add under Social Links.

Make sure you click on Done in the top right when you have finished adding links.

http://instantsocialpresence.com/yt/home/training/how-to-customize-your-youtube-channel/

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