If I'm watching YouTube on my TV, I mute it when anything longer than a 5 second ad comes on. If what I'm watching is less than 10 minutes, I'll just back out and start in again, usually it will come up without the ad, then seek to where I left off. Although oftentimes lately, I'll be watching a 5 minute video, and I'll get 1 minute in and get hit with an unskippable 2 minute ad, I just quit YouTube for the day.