Did you actually watch the video?

He literally presents a list of reasons around 5:12. Then he goes on to describe how formaldehyde already affects him.

Resin priting can be a lot of fun, but he’s correct: that shit is toxic. It needs to be respected, and he’s also correct in pointing out the carbon filter on many printers is basically a placebo for the consumer.

Still don’t believe him? Fine. Go checkout the small book that is the set kf warnings with this stuff from a resin producer: entropyresins.com/safety/epoxy-safety-tips/