The main thing I took away from the video was that you will need more rounds of 10mm to stop a large bear because it under penetrates compared to even a mild 357mag. Which is very true.
Before the fan boys start howling, I am a 10mm fan in a defensive handgun. On humans,dogs, cougar, and other thin body varmints. I am also qualified to speak on bears having taken over 30, several over 400 pounds and a couple over 500, with a handgun. The 357 has proven itself superior to me after shooting a few with both.
In fact I am using hp bullets in the 357 now to limit it's penetration so there's less chance of an exit hitting a hound on the bay. It simply kills faster and will break shoulders better. The round nose requirement of an autoloading pistol often causes the bullet to deflect and follow the slope of the skull if being charged head on, failing to penetrate into the brain. Seen it a few times personally. Never heard of it happening to a proper flatnose revolver bullet, (swc or wfn style).
I will state however that I do carry two revolvers following the dogs, a Service Six 4" 357 for reasons stated loaded with MP 358429 hp's on a max charge of #9 and a 5-1/2" BFR 500 Linebaugh loaded with MP 512-525 lg pin hp's on max H-110. The 500 is in my hand when first approaching the bayed fight. That's when you are most likely to face a head on charge. In my experience it's got a 100% one shot stop rate from 6 charges by bears from 468 to 567 pounds. A few were already wounded by poor shooting clients with rifles. Handguns are better stoppers in brush if you can use them, but a 12ga is better yet.