MrBeast[0] has about 182m subscribers, and it is probably easier to get a subscriber on youtube than a user.
Views are easy to inflate, I wouldn't even consider it in the same ballpark. This video[1] of Vivaldis 4 seasons has about 1/4 billion views.
The shortest time to 100 million users is almost a definition of the quickest growing company.
[0]: first or second largest youtuber.
[1]: https://www.youtube.com/watch?v=GRxofEmo3HA