The puppy was being trained for hunting. Meaning she killed her for doing exactly what she was being trained to do. Of course she wouldn’t know there are some animals she shouldn’t chase.
Oh, and this is not a one-off thing from Noem either. She also mentions shooting and killing a male goat for “chasing her kids”.
In any case, I worry when someone’s solution to completely fixable issues with other living beings is to just kill them.
NewPipe app is a good one, or Tubular if you want sponsor block too (though you can’t comment or like videos etc. on either). But if you want to use the actual YT app, the solutions in the other comments are good. I assume that setting up a Pihole or some other ad-blocking DNS could also work.