I'm watching it entirely, and now i hear at 6:28 "avec du bois d'épave et des os".
Meaning from shipwreck wood (kayak?) and bone.
At 8:01he speaks about making a bow with caribou antlers and bone, or bone and wood ("bois ordinaire")
His father's bow was made entirely of caribou antler and dito sinew (nerf de carinou).
Its a pity nothing was said about the sinew cable.
Did you mark the mediterranean two or three finger draw?
Also his tillering prior to cabling is noteworthy!