I started watching the vid and had to stop. what a load of twaddle. Back quivers are useless? Um, I used to hunt a lot, you don't run around when hunting, you stalk, slowly and silently. Back quivers work just fine. North American natives used them - sometimes with covers.
The 'fast draw and loose' is very clever, very impressive, but he isn't doing a full draw. Those arrows would not have the momentum to penetrate medium to large game and certainly not heavy clothing (let alone armour).
Anyone who has shot a heavy-poundage bow knows that the biometrics of the human body mean it is easier (for right-handed archer) to draw with the top of the bow canted to the right. Ergo (disregarding mechanics of the release), you need the arrow on the left of the bow.