Oh, yes! I've seen that video myself, and when I saw the title on the channel, about not managing to shoot 1 MOA I was like "WTF?!? Sure you can!" but then the video is about shooting 1 MOA, 5-shot groups with
hunting rifles (i.e.: standard stock & pencil barrel) and factory ammo, and I see his point.
This kind of rifles can usually print very tight 3-shot groups, but on a 5 shot group the thin barrel will usually overheat and the group opens up, which I believe it's what happened, and I believe the message there is how accuracy claims from manufacturers should be taken into context.
1 MOA 3-shot group is one thing, 5 or 10 shot groups, 1 MOA another.
Anyway, I'm intrigued by the concept. I've recently acquired an interesting 7x64 hunting bolt action (a Sabatti Rover with the old 2 tenon action) I got for no other reason that it's an old rifle manufactured the old way: full case hardened receiver, jewelled bolt, premium grade wooden stock, plus it was on discount and got it for a ludicrous price.
I've found an old Swarovsky scope with blued steel tube to fit.
As soon as I can find the rings I want for this build (round, case hardened steel rings) I'll set up the scope and try some 5 or 10 shot groups, and see what happens. The tricky part will be finding match ammo, vs hunting ammo you commonly find in this chambering.
As of now, I just bought a box of soft point RWS red box hunting cartridges (just because on principle I don't like having a gun and no ammo to go with it) but I do not expect 1 MOA accuracy from that ammo, even shooting at 50 yards...