Video keeps saying error after the RIO 3 second clip intro.  Nevermind.  I got it working.

A3s hand, if this hand was vs a reg are you calling the turn lead? 

Is raising pocket 4s UTG in FR correct simon?

I had to stop watching after you said you x/f AA on the 7c4h2hKd4d runout vs a reg...correct me if im wrong, but your main reasoning is that you assume he will x back all the mid pocket pairs otr, and he wont bluff busted draws on the board pairing river?  If you x/f AA here, what is your x/c range?  Only trapping full houses?  I think you need to NOT allow the free showdown to villain in this spot, AND I think you need to also bet more ott if you think thats going to be the last street that you feel comfortable getting value.   I mean, why even set up stacks for a river shove otr if you are x/f it?  I just dont get the logic...either bet more than 1/2 pot ott and x/decide river OR bet 1/2 pot like you did ott and then shove river.  If he can have K8hh then he has K9hh, KThh, KJhh, KQhh, possibly some sticky 7Xhh

The problem with your logic is all the hands you mention do not bet the river, they take SD value given positions. Check folding the River with AA is correct here given positions, run out and the action on the flop: Whale donks, Hero raises 3.5x with another player to act behind & the Reg cold calls a bet which is essentially an overbet of 1.8x pot. 

The Regs cold calling range here is going to be heavily weighted to sets or overpairs to not force the fish out of the pot. The fact that a reg showed up here with the hand that he did means you can probably change the reg to "regfish" His cold call on the flop is just terrible. 

If you make a hero call here with AA vs a reg by check-calling the river  or shove the river, you are going to be bleeding money, and lots of it. You may be correct here 1 time in 15, but you will have ended up losing 14 stacks in the process for every 1 time you are right. Change the reg to a fish and it's a very different story.

I think I read somewhere that you are trying to make the transition from live to online and you are playing 1-2 and 2-5. I do believe you will  be in for a surprise. The break even reg playing 25nl and 50nl online has the skills to crush the stakes you play live.

The skill gap between live and online is gigantic, enormous, colossal, monstrous, momentous, massive, titanic,

^^ yes it really is that big of a difference

maybe villains assumptions need to be re-evaluated, I see someone show up with K8s and (admittedly after the fact) I start thinking about how his range to get to river is much wider than I had assumed.  I think for x/f river to be correct 1) he has a to be a pretty decent reg 2) he has to always take showdown value when he has it 3) he has to never be bluffing

I can get on board with not value shoving the river, but x/f to me seems pretty weird, I agree that villain's value range SHOULD beat AA, but that's if all of our assumptions are solid, which as we can see, he shows up with K8s, he's starting off the hand with a wider range than we initially expect