if I take a closer look to the ads on youtube, I get the impression that the big channels get the ads from the big companies and the smaller channels get the more local, smaller companies which i often see once a time (and klick them sometimes, because they are sometimes quite interesting) while I see the ads at the bigger channels more often than I ever wanted to see them.
Is it just me, or is youtube differencing between small and big channels, based on the budget of the ads?
Based on the fact that youtube offers TrueView ads they get only money if someone klick on an ad or is looking the ad for more that 30 seconds. With my personal behavior youtube is earning more money with the small channels than with the big channels.
Ads cost various amounts of money. Advertising on the big channels cost more than the smaller ones. The latter also have a smaller reach and so it depends on how much money the ad creator has put in for his campaign and how local he wanted it to be. If your video has an ad and it plays in the US you'll get x amount of money. If it plays in India or Ukraine you'll get a fraction of what the ad would get in the US. Every time a monetised video is loaded the server checks who is the one watching (preferences, age, watch history etc) and an auction for the ad happens. Then the ad gets displayed.