To be fair, the "wooden cutting board" ad is actually trying to tell you (if you listen to the whole thing) that plastic cutting boards are a source of microplastics but wooden cutting boards will instead result in bacterial contamination; thus they're selling you (supposedly) a titanium cutting board. Which of course will command some ungodly price tag both because of the material (supposing for the moment that this is legit) and because you'll supposedly only ever need one.

And I don't think any of these are nearly as bad as the ones trying to sell you on some purported absurdly large arbitrage on crypto markets. I've also seen some for supposedly super-advanced data storage devices that I'm quite confident are scams; and bogus scam ultra-high-capacity USB keys are already all over the place to the point where they'd be a huge problem even if never advertised.

(I usually don't care as much about first-party ads like this because at least the advertiser isn't serving me custom JavaScript. And I do sometimes let these things play if I have the video on in the background.)

It's also really noticeable how you'll keep seeing the same ads for the same few things, regardless of what your "algorithm" is currently doing. I really have to wonder how much YouTube makes off those cutting board guys.