I've just come in on this and spent most of my lunch break reading. As a newish member I agree that most threads on here are either very useful, or are the type that make me think "oh, so this doesn't only happen to me?". On every part of the internet, on every forum, there will always be some negative posts which may be intentionally negative. just like recently, I bought a six pack of pears and one of them was bruised and slushy. I still buy pears though.
Matthew - my wife is autistic too so I know (even in person) that tone, humour, sarcasm etc can either be mis-interpreted or not picked up on at all. It is still virtually impossible, even for those without autism, to understand the tone of every piece of text written. I'd suggest a good comprimise would be to carry on posting your videos but just don't comment on them yourself. Might be interesting to see what other people think of them first, if they are left with a free reign?