> and many will likely just endure it

And many will change the channel and watch something else in the meantime. Youtube checks that you have clicked away and just waits for you, basically FORCING you to watch the ad. TV and radio don't do that, neither do magazines.

If Youtube was TV, in this analogy every channel has an ad as soon as you open it. Oh, and when you go back to a channel you switched from due to an ad, that very same ad is waiting for you to watch it dutifully.