I'd seen this before, but it's more amazing on second viewing. But my second viewing was informed by threads I've read here, which have taken my understanding of autism from zero to a little bit more.
This time I picked up that Carly is a twin, so she's been in the same environment, pre-birth and within the family, as her sister - which goes a long way to demolishing the argument that it's a parenting thing. (Are people still saying that?)
Secondly, I listened more carefully to what Carly was saying, describing what life for her is like. I can't imagine what it must be like to be so hyper-aware of the world to need to escape from painful stimuli - I think most people could understand that just a little bit, but for them/me it's usually a temporary thing, not something that's permanent.
Carly's parents are remarkable in their persistence in trying out various therapies. But then I thought about their financial resources to seek out those various therapies, compared to what I've read here about limited NHS resources.
I will be posting the link to a couple of other forums I inhabit - and making it clear that it isn't about some kind of "miracle cure", but about listening to Carly.