Adobe came out and said it is not supporting Flash on Mobile any more.. so any browsers coming out from here on out are not going to have it.
i have noticed that if you hit the "full screen" button on videos it will usually play them for you just fine.
only had to open a page once in the stock browser so i could view something.
you have to keep in mind, most pages are made to be viewed on an iphone...which doesn't have flash. so they will usually work without it.