He's a right-to-repair activist Youtuber who is quite involved in GrayJay, another app made by this company, which is a video player client for other platforms like YouTube.
I'm not sure why his reaction would be relevant, though. It'll just be another rant about how Google has too much control like he's done in the past. He may be right, but there's nothing new to say.
He wasn't just involved with GrayJay, he's actually a member of FUTO - the company behind Immich and GrayJay. Now read grandparent comment one more time:
> Wouldn't be surprised if this leads to a lawsuit over monopolistic behavior
His reaction also matters because he's basically the public face for the company on YouTube and has a huge following. You've probably seen a bunch of social media accounts with the "clippy" character as their avatar. That's a movement started by Louis Rossman.