A post on Reddit…
The product is Infography, an AI tool that turns blog posts into infographics.
Researching it, I found this video review on YouTube 
…
It’s a simple screencast with a voiceover, the guy just trying out the tool for the first time and sharing his impressions.
Nothing fancy.
Posted 3 months ago, the video has ~5000 views on a channel with only 16K subscribers 
He has an affiliate link for Infography in the description, and gets paid 30% per referral, works out to $15-45 commission per sale.
I wouldn’t be surprised if that video has earned $400+ in commissions 
And that channel is posting a review video like that almost every day.
Lots of opportunity for review channels like this, similar to how niche review websites started taking off back in the day 