I don't have a clue how to get to the broadcast from the google+ link. After playing with it for 30 minutes...
It's impossible to get there for anyone that is not logged in or doesn't have a google+ account from that link.
Even when I'm logged in and then go to "my" google+ page... clicking on 'Your events', 'Find more events' or 'Hangouts' does not get me there.
If I click the 'Events' drop down and then click 'Home' - it's there - how did it get there? - I don't have a clue how it got there on my home page. Unless, when it was created it was shared to those in your contacts - which means for anyone not in your list of friends, they still will not be able to view it from the google+ link as far as I can tell.
Plus, the link above was the first go round - that ya'll didn't get working - it does not link to the one you did get working. So, both of them show up on my homepage of google+, one that has no video and says it is coming and another that works.
The youtube link for this one is:
Mac-Forums Weekly Broadcast - YouTube