Financial results for Google (Alphabet) for 2019 tell us more about YouTube earnings from advertising than before. Revenue from YouTube ads amounted to $15.15 billion in 2019 - up considerably from the previous two years. This is good news for me and other content developers using the YouTube platform to publish our videos (and allow YouTube to serve ads on them). The graphic below shows the growth in revenue over the past three years:
You will find more infographics at Statista.
I can see this effect on my own channel. In 2018 there were 3,473,515 views on my channel, but this decreased to 3,159,607 in 2019 - a considerable decrease of 313,908 views (9% approx). However, in the same time my revenue grew by about 35% (approx). Long may this continue!
What it does show is that there is money to be made from YouTube. I don't earn anything close enough to an annual salary, but it is a nice top-up on the salary that I already earn. I don't know the exact figures, but I understand the breakdown in revenue that YouTube takes about 45c in every dollar, leaving 55c for creators. So if YouTube makes money, so do the creators.
So I encourage developers to try out the YouTube platform - you may not become a millionaire overnight, but even if it is just pocket money it's a nice way to get a little extra income. Do be aware that getting people to watch your video is not easy!