That child was not safe - I would expect social workers to investigate the kid's home life and assess it. The fact he was passive, despite the turmoil going on around, is a strong hint he has learnt to keep a low profile :( :(
Apparently the whole thing is being investigated and she will be identified soon, I would think.
I wonder if I would have said anything if I had been a witness? Prob not if I was yards away, but if I had been close, I would have had to, I think. The person who did the filming has done a good thing.