Youtube Setup addon lets you easily apply your created keys inside Kodi and main Youtube addon.
First, get your own keys by reading this wiki post.
Then create a text file to load it locally or use a service like pastebin.com
See file.txt and file.xml in examples directory, you can use either of the two formats, whichever looks more logical.
file.txt looks like this:
file.xml has the info in xml tags already, so pretty self explanatory:
client.json (beautified/formatted)
Supported services:
This software is released under the GPL 2.0 license.