If the content itself includes paid promotion then (a) it’s not individualized, and (b) the platform you view it on (YouTube, FreeTube, Blu-ray, or VHS) doesn’t matter… …so I don’t think paid promotions from the content creators themselves are relevant to the discussion? Your only option is manually skipping the promotional content which is usually really trivial to do.

I have YouTube Premium and don’t see any ads by Google/YouTube. I’m not a heavy YouTube viewer though so it’s possible I’m missing something.

Edit: just discovered sponsorblock and wooow am I impressed at the lengths some folks will go to skip ads. TIL

Sponsorblock is great, it really makes some videos watchable.

Though in general if there is a lot of sponsorship in videos it usually means the content itself is also really mediocre and spammy so I don't tend to watch those anyway. The people who really have a lot of technical knowledge don't monetise it very much because they don't have to. Being an expert in their field already nets them more than enough money.

I watch very little youtube anyway, as I dislike the video format and prefer written content. But when I do need to because what I'm looking for isn't available elsewhere, sponsorblock is a great help.