There's more to ads than banners and unskippable videos.
I bet if you open YouTube, even with Adblock and sponsorblock, you'll see ads. "Tech" channels are nothing but ads because all they do is present products for people to buy.
Even channels that do legos are ad channels.
YouTube itself has become a platform for serving videos that are advertisement at their core. These videos are popular, get good engagement, pay the content creators and come in cheap for brands. This style of "journalism" extends to many other platforms.
Sponsorblock (FF extension) is neccessary for YouTube, as well as Seal (GUI for yt-dlp) + BravePipe (fork of NewPipe, integrated Sponsorblock) for Android.
Also, adding `Before: YEAR` in search takes you back to a more wholesome time.
Watching Youtube through Brave browser and I can't remember the last time I saw ads (ads by youtube, not by the content creator within the video). Twitch is different story, platform ads certainly play there.
Prior to Brave, ublock origin on Firefox provided a similar ad-free Youtube experience.
I don't consider ad content like the tech channels you mention to be a negative. Informing people about new products is a useful service. The ads that are negative are those that impose themselves over other content or mess with normal internet browsing experience.
Personally I do consider them a negative because they are not really realistic and grounded when giving reviews.
It's a different story if it's a person that's used a device that they bought for a year. But these tech youtubers, they are extremely dependent on a good relationship with the brands because what brings them money is doing the "reviews" on day 1 (if not before) and they can only do that if they have a good standing with the brands. Meaning they will can only talk the product in a way that they know the brand is going to be okay with, mentioning obvious flaws that are easy to disregard ("it's not the best value for the money" is a classic).
This is bad because this type of journalism is constantly moving the window of what's acceptable. Channels that are truly critical (for example gamersnexus) don't get any support from brands. Channels like that are rare, of course, they do exist.
So, to reiterate my point, these channels are not informing: they're selling. There's a really good documentary with Noam Chomsky called "manufacturing consent" that really gives a good overview of this topic. Well, it's about politics, but the same applies for marketing.
I bet if you open YouTube, even with Adblock and sponsorblock, you'll see ads. "Tech" channels are nothing but ads because all they do is present products for people to buy.
Even channels that do legos are ad channels.
YouTube itself has become a platform for serving videos that are advertisement at their core. These videos are popular, get good engagement, pay the content creators and come in cheap for brands. This style of "journalism" extends to many other platforms.