Quote: The most dangerous person in this world is one who knows his strength but does not know how to terminate it if applied.
It is based on the social networking site that you are working on for Yahoo, Skype you require 256 or 512 Kbps will be basic internet speed to see the video. Sometimes using this slow connection we can see only blurred images.
Usually the web sites will adjust the quality of the video streaming based on your based on the band width of your internet.
It is based on the type of connection and how many of them are using the connection will also result poor video streaming