You get the same ads as when the show is airing live and if it’s a local market slot you get a dark screen with text saying it’s taking a commercial break.
When watching shows you recorded as a DVR you can skip them by fast forwarding.
When watching shows YouTube tv has offered that you didn’t record you get preroll and in-line ads that are usually unskippable just like Hulu.
I have recently returned to watching golf by subscription to sky sports golf. They often mirror the NBC/CBS advertising schedule instead of using the clean feed. Totally ruins the golf tournament. I have to pause 45 mins before I watch and use an app I've written to quickly jump the two minute ad breaks.
I've spent much time in American hotel rooms. Watching TV there is like entering an ADHD simulation.