She's not bad, but she's not very good either. I used to sing (not much any more), but it's fairly notable when she's out of tune (though her singing in this video aren't the worst). She also puts way too much reverb, it sounds unnatural.
Maybe it was a bit harsh from me to say she sings "badly": her posture is good, she seems to have some lung capacity, her sense of rhythm is alright (not always), so she has potential, but if she learnt singing techniques (to manage her breath better for example), her singing could be improved (a lot).
(oh, and did I mention too much reverb? )
She seems to have few viewers, so I'm sure she'd reply if you interacted with her. Have you already discussed with her?