Hello,
I have a solid ADSL connection speed of 55.37 Mbps and I can play youtube videos, watch HD TV catchup services and Netflix without any problems. However at some times of day near race weekends I can't watch MotoGP and WorldSBK at HD resolution. Sometimes it is low res which looks like an impressionist oil painting!
When I investigate actual download speeds I get widely varying results depending on the test provider. Google home says I have a lightning fast connection and reports 50.2 Mbps. Fast.com powered by Netflix always reports a reasonable speed as well, currently 53 Mbps. It varies between about 40 and 55.
However when I have a problems with MotoGP Which's speed test can be as lows as 2 Mbps to 5 Mbps and www.speedtest.net can show similar slow speeds as well, although on good days they show much higher speeds, closer to the actual line rate.
I have been in contact with Dorna and after a long email conversation they offered a refund but no fix. They say only a small number of their customers have this problem. I have looked at the bandwidth used by Dorna videos and it is about 6 Mbps, so about 4 times other HD video services but that should not be a problem for a 55M bps connection. I can watch other HD services at the same time and it doesn't make the Dorna feed any worse. So I do have plenty of bandwidth, just not to Dorna.
So what is Which's speed test doing that sees such slow download speeds, that only affect Dorna's videos? It seems like some part of the internet has a slow connection to Talktalk but other parts are always fast.
A traceroute shows the Dorna videos come from an Amazon server in Seattle via 19 hops, lots taking around 100ms.
