In my experience YouTubers who review things are running little lifestyle businesses, getting free products (or possibly kickbacks) in exchange for positive PR.

I would consider a YouTube channel that primarily reviews things less trustworthy than a rando on the internet, not more.

Even if the YouTuber is totally trustworthy, "professional" reviewers are only going to give short term impressions, how its features and cost stack up in the market, etc. which I can research for myself. What I want to know about is long term experience, failure modes, etc.

Pretty much only Consumer Reports is in that business, and only for big ticket items like cars.