Youtube ads

Do you ever notice when watching YouTube now that the ads on long videos are said to be less frequent but longer for a better viewer experience yet they feel around as often as on shorter videos only a few years ago, they just have an excuse to push longer ads with the option to skip to the next ads because of the shortening of attention spans likely to stop people from just leaving the video? 

(no real research went into this, this is just something I've noticed recently and an opinion of mine)