judging by how quickly the fumes are drawn away from the beaker at 23:10, I would say he has a pretty good SCFM draw rate on the face opening even though the sash is full open... which is what really matters. Judging by kadrivers history, i'm pretty sure if he even caught a wiff of a something he would fix the hood ASAP and document it in his video to warn others.
The guy wears clean gloves, a lab coat, safety glasses, face shields, stresses safety, and adding reagents in small quantities, using catch pans, gradual heating, gives safety warnings, labels everything, has a clean lab... but you know, utterly crazy lab ethic and safety protocols that leave a lot to be desired?
If you have concerns or think you are being over critical, maybe you should ask questions first before you just hurl insults?