Well if you have a trusty Telkom ADSL connection and are having issues viewing YouTube videos try this. Make sure that your browser proxies setting are as follows
dsl-cache.saix.net port 8080 (or your ISP proxy)
In IE - tools, internet options, connection, LAN Settings, Proxy Server, tick use proxy server and now put in the address and port number.
Firefox - tools, options, advanced, network, settings, manual proxy settings, tick use this proxy settings for protocols, now put the address and port in the open space.