Could be many reasons. In my personal experience I had good experiences with my Desktop and often poor experiences with my Laptop. After investigating I concluded the most likely problem was the video driver for the Laptop video card simply not being upto the task of processing the flash player high quality video stream.
As there is now a Windows BT sport app available you may wish to try using that instead of the web site player. My laptop which struggled with the web player has produced good streaming with the app.
Just select the Windows button at bottom left and search for Windows Store and/or BT Sport
If you've got a smartphone You'll probably find that £30 for a Chromecast is money well spent. I got one when BT Sport online buffering became too much to bear and have not looked back. It's also useful for other services, like BBC iPlayer, which support casting, particularly if you don't have a smart TV.
Thanks for the reply Zulu. Defo not my video card driver but I shall try the app.
This might help. I have Vista Home Premium and use Firefox as a browser.
Using Firefox and accessing BT Sport online to get MotoGP - buffering, buffering.......
Decided to try viewing BT Sport through Internet Explorer (apparently available on Windows 10) - problem solved.
It's likely to cause confusion if you keep posting essentially the same query on multiple threads. Try a Chromecast - as I said elsewhere, you can always send it back if you buy online but I don't think you would want to.
My mistake, I wasn't paying attention to which forums I was on as I came to them by different searches & was wrapped up in this darn (very polite term) problem & wanted as many responses as possible.
Well I bought a Chromecast2 today and....... No workee. With Home Hub 3 it doesn't link with the hub. Has taken hours to get nowhere. I had a lot of tabs open & have read a lot of threads on various fora; Windows & Chromecast etc ....
I changed channels on the hub & checked that UPnP is enabled. It seems possible to add the dongle to the hub as a device except the hub asks for device protocols & port settings- which are not available. One issue seems to be that it "might" work if I opt out of BT FON which leaves me unsure if I will be able to easily opt back in. And I do find FON useful on occasion.
There is also the DMZ but I am slightly reluctant to get into that as it warns of dire security risk - 'tho it must be said I'm not too concerned about the dongle getting hacked.
It seems the app might work better on other devices (Android) but as well as W10 laptop I have a Windows phone which Chromecast doesn't support (the available Windows phone apps are all flaky) .
I really would like to get this sorted as I love my Moto GP..