I just sent a PM to WebAfrica about this problem. Here is an abstract of the message with my test:
Using
this video as an example, purely because the number of number of views will guarantee the video is available from a local CDN.
This video was streamed at 720p quality and couldn't not play without buffering every few seconds. This test was performed 2015/06/02 at about 21:00. My connection is a 10mbps ADSL line syncing at 10240. The line stats are acceptable, no signficant line errors reported, and the connection has been stable for 4 days (last reset was due to power outage).
Here is the bandwidth graph as recorded by the Mikrotik router while playing the video.
http://imgur.com/u11rkKC
As you can see, bandwidth during streaming appears to be limited to about 1mbps. Oddly I have noticed the exact same behaviour while trying to download an Ubuntu torrent where the maximum download rate is also limited to almost exactly 1mbps.
Here is another bandwidth graph while trying to download Ubuntu Desktop from the Ubuntu
http://imgur.com/8EZSGHr
For comparison, here is the same video being played while connected using my Afrihost home capped account. The video consistenly streams at 8.8mbps and manages to buffer ahead without having to pause.
http://imgur.com/SckWt0h
And the same Ubuntu download using Afrihost account:
http://imgur.com/Y04vrxH
EDIT: Don't be fooled by speedtests. This is the speedtest for my WA account:
http://www.speedtest.net/my-result/4404584764