To easily create a link that allows people to subscribe to your YouTube channel, simply add the following to the end of your youtube channel address:

?sub_confirmation=1

 

So, here is my YouTube channel address:

https://www.youtube.com/channel/UCEEOqdKvDT4IFh3IJmhvuvA

 

Here is the subscription confirmation extension to the URL:

?sub_confirmation=1

 

Bringing them together, you get this:

https://www.youtube.com/channel/UCEEOqdKvDT4IFh3IJmhvuvA?sub_confirmation=1

So when people now click on the above link, they will be taken to my YouTube channel and they will be subscribed to my channel. EASY!