Just like to jump in and say I've been getting issues the past few days with watching the video content too, its only playing a few seconds then buffering. My download speed for a GB video is currently almost at 0kbps, but my internet connection is fine.
I'm on 150Mb down, 30Mb up fibre in Ireland too, so maybe there's something up?
Been having this exact problem for about a week. 300/30 speed for me and I'm pulling like a few kilobytes from GB sometimes.