You raise some valid points, but some of the points are not exactly what I consider damning. There are plenty of other videos of sizable views that has far lower/higher likes. I will acknowledge that the spike is pretty weird...
But at the end of it all, you yourself raise the most important point to keep it, given that at the very least, several million of his views are clearly legit. So I disagree with removing it since that has variable impact that cannot be quantified on our end other than guesstimate.
That being said, if you want to break it down by channel level, there is this so that you can exclude out channels you feel are iffy: