I know that YouTube creators need to have ads seen in order to get paid, so I'm willing to put up with a small amount of ads to help the channels I like keep going. What annoys me to no end is when creators drag out the length of their videos in order to make sure it's over 10 minutes long so that two ads will be inserted into it which generates higher income. Some of these videos could have been cut down to 5 minutes or less, but they would only have space to one ad which means lower income for the creator.