I'm cringeing at this already. Do we have the technological knowhow for this? History would suggest it's borderline.
I would think so. From the people claiming it worked perfectly, it's reasonable to assume the issue was the server support provided for the video by Facebook being underestimated, since the upload must have worked fine for some to get it fine. Youtube are older hands at live video streaming to millions at once, so I would expect it will be better, and hopefully available in 1080p instead of 720p.
It might also be that EFC are moving around because of the feedback - in house, shit, try FB, still somewhat shit, now try Google. tbh they were the obvious choice in the first place, but hopefully the clubs backwardness over tech has now expired!