Below are several different videos about exploding arrows.
Honestly, based on the videos, most homemade exploding arrows do diddly squat for damage. The guy who claims his arrows could be sold to people looking to shoot elephants is off his rocker if he thinks his tiny little explosion is going to do anything more than annoy and scare the elephant.
If anything what you want is some kind of professional military grade exploding arrow - like in the one Rambo movie. Or the over-the-top "blue explosive" arrows that Hawkeye has in The Avengers film.
Explosive arrows are largely fantasy. You'd need some really high tech explosives in order to do serious damage to a target.
