This video is an awful is an awful resource to prove your point. That enemy team didn't know what they were doing, they were all split damage. They were also all stacked.... against a very heavy cleave comp. There was also no CC going out and I saw a lot of back pedaling around wasting globals due to them freaking out.
Case in point, if you have 4 juggernauts, and the enemy team all stacks and just stands there for you to cleave them down, you're likely going to win.