Courtney Hadwin is a 13-year-old girl who showed an amazing performance in America's Got Talent recently. The video is available on YouTube: Courtney Hadwin: 13-Year-Old Golden Buzzer Winning Performance - America's Got Talent 2018

I am by no means an expert but in a few moments it seemed like she was forcing her voice (vocal folds) too much, seeming that she wouldn't be able to keep singing like that for more than a few minutes.

I am specifically thinking about what she does with her voice when:

• She says the word "afraid" (at about 1:54)
• At the last scream when she gets on her knees (at about 2:21)

Is there a name for this kind of sound?

Does that hurt the vocal folds or was it be done in a way that does not "damage the voice"?