I have a similar issue using Brighthouse in Florida. For the longest time I was able to stream HD quality from netflix through my roku, until recently. I always

I have a similar issue using Brighthouse in Florida. For the longest time I was able to stream HD quality from netflix through my roku, until recently. I always suspect that my ISP is somehow the cause, the only problem is I can't imagine how I would prove it, or what I could do even if I could prove it.