Pauseless mss or Umss (unbuffered) is typically considered not rta viable on hd because when you hit the neutral position on the analog stick you lose up to half the speed you have built, HD pausing is also much faster so a good unbuffered mss actually only saves about 40 seconds. it's also worth noting that the blackwind technic used on the standard definition version of the game does work, but because the deadzones are bigger, even with blackwind the neutral position is still covering part of the middle of the controller which is what sd avoids with blackwind, making blackwind much less effective, many runners I know can get roughly 100-150 speed if they focus really hard, but noting a way that's faster than optimal pausing so unbuffered is considered not worth in hd

I'm afraid I don't know which wall you mean, when you say left do you mean east or west and which pig, sorry I'm just having trouble picturing this, also sick that you found a superswim out of a clip those are pretty rare depending on the speed you have with the swim it may actually be useful, if I knew which part you were talking about I'd mess wiht it to see if it was consistent and see if there are ways to change how much speed you get the clip with, if you want a link to the speedrunning discord is on the discord tab of this game, that's where most people talk about things like this so feel free to join

Also if you check the rules for categories, until you reach a certain time video proof is not required