G+ Hangouts have now been integrated into YouTube Live – so you don’t get Hangout event notifications via G+ anymore 😦
To join a Hangout Live discussion you need an invitation from the creator of the Hangout – you should be sent an invitation that will popup either in the Hangouts App on your mobile device (if you are signed in with the same email as your G+ account) or via being signed in to the Web interface at https://hangouts.google.com
We will invite participants to join the Hangout discussion 5mins before starting the YouTube Live broadcast, so login to either the Hangouts App or the Hangouts web page early.
If you follow the creator of the YT Live Hangout you should get an automatic notification when the Hangout starts as well – My G+ name is +Thom Cochrane
If you simply click on the YouTube Live link for the Hangout you will be able to view the Hangout once the broadcast has started, but not join in the discussion directly – although we will enable the text comment feature of YT Live.