>>111929510I searched "Steven Universe" on youtube and changed the settings so that the results were arranged according to their viewcount. Four SU videos had more than 20 million views. All of them have gathered their views during a timespan of several years. Meanwhile, Hazbin Hotel and Helluva Boss have only been up for a few weeks. Judging by the current rate, Hazbin Hotel will pass the viewcount of three of those SU videos before the year ends, and very possibly the fourth one at some point later on.
10 and 20 million views are a lot. Whether you like or dislike Vivzie's work (I find it very flawed), it's still impressive that the videos have managed to be that successful.