RE: I tried to warn him
Hands down funny. I like how after the crash you can see the same power line pole right over the wing, you could not do this in another 1000 flights if you tried. At least you have the video.
I would suggest a slow flyer, if you got to learn yourself. It can be done, but you need to know the basics to do it, and the right trainer, that plane was haulng the mail. A simulator would be a plus, too. Luck was with him, for sure.
No harm done, fix that model, then try a slow flyer before another try with the speed devil.