After we switched over to the new view all was working great and Tot was visible and playing around.
No idea if the switchover caused it or if it was just YouTube Live running into a problem, but we lost the feed.
But we are back now - our partners at Rogers got the encoder software working again and we are back up and running. When/if we do another switchover this year, we'll automatically reboot the system I think, maybe that will reduce the chances we'll have to do it on a weekend!