It's The Raggle Taggle by Boots & His Buddies. YouTube has started tagging the song names above, under the view count, with a link to buy the music if you want to. Not sure when that started, only just noticed it a little while ago.
I like this routine a lot because it's not the same as all of their other ones :) They usually transition from the same move into another same move (if that made any sense haha) and end the dance with the same rountine and song even if the beginning was different. Not to say that they aren't great or anything, but it's nice to see something different :D I love Max and Annie!