You can see the third base umpire point out the interference in that clip. As soon as that happened, the play was dead. Everything that happened afterwards, whether all three runners scored or all three runners were tagged out, was inconsequential. At the time of the interference, the bases were loaded with nobody out, so that is the way that play resumed. The umpires let them play it out since stopping play in a baseball game at a situation like that isn't really all that practical. No whistles, no buzzers, etc. I don't think the play is dead. Otherwise runners would be tripped on every extra base.