Kind of got mixed views on the Youtube monetising thing.
I follow a Jersey Lad in a Youtube channel called KombiLife. It documents his travels and travails, travelling the world in a VW Kombi. He started, I would guess, 8 or 10 years ago and over the years the video have got much more professional and at some stage he did learn the advantage of having a pretty girl in a Bikini as the thumbnail. It does not strike me as too bad to have to "pay" for the 30 minutes of the video by watching a few adverts. But apparently Youtube have altered the way that they reward content creators (has any one noticed the increase in those annoying "short videos") and he is now struggling to fund the lifestyle which produces the videos.
Conversely, "product review" videos can be annoying, whilst most will state that the "product has been provided free, but the views are my own", the reality is that give bad reviews and the free stuff will stop coming and the videos cannot be made.