The dude in that video will eventually slip and need stitches - always cut toward your chum, not your thumb. Every year someone I know cuts themselves and they always do it cutting toward themselves just like that.
My taxidermist wants way more skin than you think it will take - people often change their mind and wish they left more skin for a turning pose or something artistic that wasn’t on their radar originally, but they can’t because there just isn’t enough hide. He would love to have to cut 12” of extra skin off every mount, rather than fight a single cape that is too short to wrap around the form correctly.
He would also reinforce the idea that thick hair is child’s play to stich up, but thin hair is not. He would rather a cut down the back and peel the hide down the legs without cutting them at all. Yes, it requires a lot more work to peel a leg.
Look at award winning half mounts and look at the stitching on the back side of the legs - there won’t be any, because the legs were peeled.
It wasn’t touched on in the video, but you want to get the cape with head intact to the taxidermist ASAP - that’s another pet pieve of taxidermists, when they are given a cape in poor condition and expected to work miracles and not have any hair slip.
This is pretty universal information that applies to any animal.