My point was that a game with that many attacks per round doesn't sound like a great idea to me, whatever method of attack it is. Lots of watching someone roll dice for 20 minutes.
Rather than attacks per round, that sort of thing is best abstracted a little to use area of attack rules, I think.

He has other videos showing him firing accurately in mid fall from approximately horseback height. I have no doubt real combat unless the enemy were heavily armored it would work real well.He's also not in anything resembling a combat situation - a quiet room with a completely flat floor, and where the targets, crucially, don't shoot back.
The video mentioned the archer took 3 years to get to this point. A crossbow is point-and-shoot (and hand over to a shieldbearer to reload, while you shoot the spare crossbow).

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.