As a botanist with a professional interest in just the sort of things he talks about on his videos (in full disclosure, he discusses some of my research in his monologues), I think his videos are great. No harm in making learning about natural history fun!
That guy's hilarious! He's sure deep into botany, rattling off those scientific names like nothing. How many scientists have a ruler tatooed onto their finger? Very impressive. BTW, where's his accent from?