YouTube Channel?

Hello,

I've seen 2 music channels that were started as fresh channels and literally blew up after their first video into the millions, wanted to know what they could be doing?

I have an old channel thats monetized with a couple of videos on it, and was thinking of starting a fresh channel and trying to go about that.
Would YouTube algorithm push the new channel as vs. the old channel that has had botted subscribers (to monetize).

Can you share the video that went viral? It might be having something unique that clicked with people.