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SponsorBlock can also tag entire videos of the kind you cited! It won’t block them by default, but the choice of what to do when you find out will be yours.

I do notice that the GMBN and GCN videos that are just advertorials do have "AD" in the top corner when you look at the video thumbnail. I'm assuming this is an EU or UK thing, because there are a lot of other channels that do exactly the same thing but there's no such "AD" callout.

https://imgur.com/iorhrD7

These videos take away from the channel's integrity for me but at least they're clearly marked as ads

Fair point there. That channel would just have to drop for me if the "review" videos got excessive, and find a replacement or no replacement.

I'm looking to skip the embedded ad-read sponsorships, credits, the "thanks for subscribing," and "thanks for our patreons" stuff and sponsorblock does that in spades.