17:30
Pot is way too big because of the predraw 4bets. He needs to call 50k to win 312k. He is getting the right price even without an implied odds so it would be a huge mistake to fold. His opponent patted predraw and in badugi (in opposite to 2-7td, a-5td) when somebody pats predraw he has the roughest hand. The average pat hand is a queen for him, so with 236 even if we only count A-J he has 8outs of of 46cards to make a J or better.
Not counting that he can win 1 extra bets (maybe 2 if he goes for a river c-raise) if he makes his hand.
It would be completely different if let's say EP opened, we defend BB and it goes 1-1, then 1-pat. Now it would be a big mistake to peel unimproved:
-pot is way smaller
-and our opponent range is much-much stronger, since opponent started with like a 3card 7, therefore villain will have a very strong range
-also since our opponent opened EP he doesnt have as much snows had he opened from the BTN (where players can snow with a hand like 986, 875, etc...)

22:39: the hand is very similar...I dont know why i mentioned that BB should fold after the 2nd draw. If i say that then i was wrong...Now i would prefer to peel as well.
However there is a slight difference, here BB has A69, compared to 236. And also BB discarded/killed T/J/K so it means that button will have a little bit stronger range. (the previous hand BB hadn 236-34Q)
Still pot size is same, prob J9+ will win on average. I think this is still a (close) peel. Compared to previous hand, where it's a 100% no brainer peel

23:55 3bet ranges are not as clear as in LHE imo. It really depends not only how wide our opponent opens, but how he plays post. But i agree that 965 can be considered as a 3bet against a BTN open, since it can reduced and make 3card (9s65o to As65-9s). But i think that's close, depends on the opponent, and here we saw BTN folded 23, he is also middle stack, so i dont think BTN opens wide enough to justify a 3bet with 965.
If I'am in the BB then (normally) i don't have a 4bet range with 1card daws.. Yes, i want to 4bet A23, but i have a lot of weaker hands, such as this 863, 742, 765, etc...I don't want to turn my hand faceup and if somebody opens from the BTN even against 3b/4b they should not open any hand that folds against the 4bet, so it's not like BB can iso against SB.
If it's deeper stacked then SB can consider 3bet (since BTN opens wider), and against the 3bet with 863-5 i coldcall that from BB and take 1 (probably one of the weakest hand that i call/take 1)

26:10 Check-raise doesnt always work...unless if your plan is to snow...If we checkraise/take 1 then opponent IP will obviously pat. However I think i kind of like your idea/plan. Guess you meant craise/snow with A68-88A BB vs HJ big stack. The safe play is fold, BB is medium stack, there is ICM. His opponent opened MP, but since opponent was the CL we can assume he opens all badugis. With A68-88A we block opponents strong badugis and unblock his weakest (K/Q/J badugis). So if we want to craise/snow against a predraw pat that would be the best spot. Here it wouldnt work, since HJ has close a very strong hand and he shoulnt fold T742...Despite its the same as Q742, if it goes c-raise, and p-p, T742 beats just as many hands as Q742...But T742 is too high in his range and therefore he needs to calldown (IF BB can/have bluff). If/when BB doesnt checkraise here that also tells us something. Since he misses on this perfect craise/snow spot despite we have the top of our range with T742 with this extra info when i get into the same situation against that player if 3rd draw goes pat-pat when i face a bet i might consider a hero fold. Villain can still craise weaker hansd for value (like J6xx, or T8xx, T9xx), but if he doesnt have any bluffs then the question is, do we beat any of the valuehand? Prob With T742 we beat, since villain might bet T8xx...but for example T985 (or J873) we can consider to fold after the 3rd draw when villain bets