I think expecting RV parks to be able to supply wifi capable of streaming is not realistic. Least ways unless you're willing to start paying triple digit prices regularly. Most RV park wifi is much improved over what it was 7-10 years ago when it was almost non-existent. Consider what high speed internet access cost individually and then compound that by 40-100 people. And that price is regardless of whether it is being used. When asked about cable television access a few years ago, we were told that the prices just were too much to maintain, especially since it was a constant price, not variable according to usage.
We have no issues with campground wifi much anymore, as long as you stick to normal surfing, occasional utube videos. I think one has to tailor their expectations when it comes to RV park wifi abilities. JMO of course.