Ultimately, a critique of her "skill" is irrelevant. What matters is the sincerity of the performance. There is a heart, soul and passion in her voice that cannot be taught. She did something extraordinary by sharing that with all of us. I simply see no purpose in trying to knock her down for it.
I just about to say this and I saw you beat me to it. I agree 100%. Who cares if she uses this or that to make her voice good, she put her heart into it and that's what counts. Look at Kurt cobain he had a horrible voice technically speaking but we all loved his music because he put everything he had into every song. Honestly I think here voice would still sound incredible raw. You can tell she can sing. She can definitely play the guitar. I play and its not easy to play like that and sing.
Also please people lets not fight over if her voice is good or not. I started this thread because I saw that a fan made an incredible video and shared her incredible voice. Please just let's enjoy this video, she deserves for people to see it and here it and if this thread gets closed some people may never get the chance.