I’m not sure if the amount of ads is different, but the quality of ads is definitely different. The ads on TV are “skippable” in the sense that you watch 2 minutes of ads, and then in the last 10 seconds, you can skip to the end.

Any time I use my TV for YouTube now, I just connect my laptop to the TV so I don’t have to deal with those insane ads.

It’s extremely clear that YouTube is trying to maximize ad watch time, while keeping the acknowledgment by the user that they watched the ad, by acknowledging they’re paying attention enough to press “Skip”

If you’re not using a blocker on desktopOS, then probably about the same. Unless YT knows your on the couch and much less likely to switch away so they make loner ad blocks for TV than desktops??? I could see them playing with this kind of logic, but I have no idea if they do anything like that

I pay for YouTube premium now so I haven’t experienced this in some time but I did notice that YouTube would load its longest ads (I.e. Ads that are 1hr+ in length) late at night, around the time I would tend to fall asleep on the couch watching YouTube. I’m sure a PM out there is proud of coming up with this