So this guy does some crazy archery tricks, and claimed he learned it all via "studying ancient texts". He claims that by basically (1) carrying his arrows in his hand, not a quiver and (2) putting the arrow on the right side of the bow, not the left as modern archers do, that he can fire three arrows in 0.6 seconds.

Now I've been hanging around the internet long enough to know better than to trust YouTube videos claiming to have rediscovered "ancient texts", but the guy is definitely doing some legolas-level archery, and does not appear to be using a particularly fancy (i.e. modern compound) bow to do it. So if some Danish guy, who presumably has a day job, can learn to shoot like that, I can't see why an Egyptian or Sumerian who devoted large parts of his life to perfecting archery couldn't have figured it out. And while he never cites specific "ancient texts", there are engravings/paintings/tapestries which appear to support his ideas.

I'm curious whether anyone here can elaborate on whether or not this guy is full of it, and if there's any evidence that archers in ancient times ever actually used the techniques he uses, or were capable of all the things he claims they were.

(PS: "ancient" here means much older than medieval Europe, so I'm not looking for a re-hashing of the Agincourt/Longbow issue, though his assertion that archers would have been used at short range and not just as cover fire from afar does come close...)