Yeah i have noticed that too. I live in Scotland and i have never heard of a competition being held up here. The place is perfect for it as well if you go up north you could not get any better ground for natural trials.
I prefer street just now but i have not been riding for too long i would like to get into natural a bit more once i get a bit better. i find that natural videos are quite boring to watch though i prefer watching videos which are mostly street.