This is just a quick bot I put together for friends in IRC, nothing serious.
Its using the IRC library found here https://github.com/TorbenKoehn/php-irc which I modified a little to use Amphp.
For the youtube thumbnails support you need https://git.trollforge.org/p2u/ then set the path to it in your config.yaml
p2u: "/path/to/p2u"