could be down to curiosity,new channel,first video i think ,new well awaited release with promotion,several things can explain a quick start,fabro on the other hand has years of suspect views
time shows when its really suspect, when you go high in no time then 6 months after you are around the same,there is something
either a sudden complete lack of promotion or something with the bots
for example to remain in the case of jb je ne te calcule pas,correction,and the papa wemba tribute,you'll see that the views took time to reach a certain level since there was no promotion around,i believe the wemba tribute is even stuck somewhere around the number it was months ago since there was no effort to promote it