Half the known universe is hoping to make a million out of YT
You need 1000 subscribers for a start. That takes a very long time (years) unless
- you are a pretty girl doing something men, especially teenagers (many of whom live on YT), like to watch (doesn't have to be sexual; search for e.g. Nancy Pi and her excellent maths lessons, or one of many camping gear reviews with a girl presenter - gogle for e.g. girl doing camping gear review, e.g. Homemade Wanderlust etc etc)
- you have found a way to make cold fusion work
- your video shows something lots of people google for (e.g. how to kiss, where is the windows start button, etc)
You get the idea. The formulae are obvious in most cases.
BUT and this is a BIG BUT
you have to promote the video on other social media to start with e.g.
- pump it on facebook (every relevant fb forum; there are likely hundreds)
- pump it on instagram
- pump it on twatter
- pump it everywhere
So you spend your whole day doing that.
Same with book publishing these days. Unless you are a big name, say Tom Clancy (he's dead unfortunately), you need to work social media almost 24/7/365.
I run a forum (tech related, not electronics) and see this all the time. Most people just don't "get it".
There is also a lot of skill in making a good video; accordingly, most are crap. YT downsamples HD to 2-3mbps which kills quality so you need to know how to make low bitrate vids look acceptable (stabilised camera, etc).