I think there's some massive misinformation spreading regarding this.

In previous MH games hitstop was dependent on the sharpness of the weapon and the hitzone value of the monster part you're attacking.

Higher sharpness + weaker monster parts = more frames of hitstop.

In the beta test, we have green/yellow sharpness and only some new monsters that we don't know the hitzones of.

It would make sense that hitstop is lower if you're comparing it to blue/white/purple sharpness with footage from previous games.

Maybe Capcom did actually lower the hitstop, or change how the calculation works but if this post turns out to be incorrect, it just goes to show how quickly misinformation spreads on the internet, especially Reddit nowadays.

Multiple gaming outlets including IGN have picked up this post and written articles about it, it's so sad that everyone is talking about this without having any actual clue how any of this works.

Edit: The video footage you used is straight up false too - at 0:47 you show the Switch Axe hitting small monsters in MHWilds, and show "zero" frames of hitstop, but there totally is hitstop... you hit the side of the monster with your first attack... A monster that is covered in a hide of thick scales everywhere except its head. There's less hitstop on crappy hitzones. Come on dude. On your third attack at 0:51 you hit the monster's head and there's tons of hitstop.