He doesn’t seem amused to me so I hope that my interpretation is off the mark.
Part of it might be the one-take of it all. No quick memes to hide edits.
Seems to me like he’s adopting a conspiracy tube persona here.
A second viewing of it still made me laugh, so for me at least it’s working.
He’s acting. It might not be quite oscar-worthy performance, but he could certainly do some Schwarzenegger lines very well 
I’m not getting angry response vibes from this, reads to me like he’s taking it and running with it. Like you say he’s never done a response video before, has thick skin, why would he start now
But, i may of course be wrong
if you turn the volume down and focus on his body language, he seems pretty pissed off.
It is just a “meta humour” reaction to the copypasta about himself. Don’t read into it too much. You can check the vibe in the comment section under the video.
He is a niche youtuber without ads who turned it into a full time job. A relevant but not typical video is good engagement boost for algorithm.
I think it’s just that he decided it would be amusing to narrate the entire original post in the character of someone posting that seriously (even though I and he don’t think the original poster was fully sincere as opposed to ironic).
I might even be persuaded that he seeded the original post in /r/synthesizercirclejerk in order to be able to do this. But probably not.
What is this “early pop dreamy radiowave brostep from a beach near you” jam you speak of Florian? I need this. No, you don’t understand. I NEED THIS.
Yeah, I definitely saw this as a meta-goof on poorly produced YouTube conspiracy videos, complete with bad lighting, breathless crazy-eyed delivery, and scoliosis-inducing posture
I also thought the lighting was intentionally bad.
Yeah, I think he’s attempting to play a character of the person who wrote it.
This comment sent me though. “ We’ve never seen Florian’s legs. Why? Think about it. Because Florian is a plant in a pot.”
He 100% thinks its funny IMO. Its good easy content for the channel to just read it out. Keeping it a straight read adds some sarcastic meta-humor to it all. Not adding memes is probably mostly not add additional work, his other videos must already take a lot of time.
Lol I found this one super funny. His whole channel is based around sarcasm, this is no different. That conspiracy theory is amazing 
I skimmed over the last 25 posts so idk any of the details / what’s going on but I was very sorry to hear about Florian… My thoughts and prayers are with him at this time. I hope he can find the space he needs to calm down and reflect
This man makes youtube videos with 25 memes per square inch for a living, I’m kinda shocked anyone would have taken him seriously on this one 
It’s

All up in here.
Anyone know the meaning of the glass of water? Is it to indicate a glass half empty, or glass half full in response to whether he likes the gear?
Maybe it’s for when the alien demons arrive.
“Swing away, Merrill!”
I’m not going to lie, there were some absolute golden sounds coming out of that Electribe. Not golden enough for me to want one cluttering up my life, but good enough to tickle my ears.
This holds true for every first gen Electribe
Gen 1 Electribes … my intro into electronic music gear 
There is something magic about the ES-1. It is a huge headache to load samples from computer, and the effects are almost entirely trash, but the UI is perfect. I liked it more than the ER-1
I’m resisting buying an EMX or ESX, hoping korg updates electribe the way the people want