Might not be in your side i suspect, but who knows.. Speedtest.net seems normal, and so does youtube etc.. but i use premiumize via their cloudflare cdn or direct from their servers, and where I can usually stream a 50+GB file without hassle, it's really struggling with even half that size tonight, and it seems to happen more frequently over the last couple of weeks..
If i run their speed tests its all over the show.. most cdn"s not even breaking 1Mbps..only Netherlands cdn getting about 7MB/s (aprox 60Mbps?), and on occasion their direct connection I get the same.. Their Cloudflare cdn is usually the fastest (12MB/s), but these days its the slowest...