Really, there is no need for setup. It was a finalist for Australia’s TropFest 2013, but that’s really irrelevant. Just watch. It’s only seven minutes.
NOTE: Yes, this is about the only time I’ve seen “children (or baby) in peril” done in a way that’s emotionally satisfying and not a cheap gimmick. But yes, there’s an infant in peril, so if that’s a problem, back away.