For whatever reason your computer might be blocked from viewing certain websites. There are a number of easy ways to get passed any block whether you are at the office, blogging through the great firewall of China, or just on a library computer.
The easiest way to get passed any blocked websites is by simply accessing a proxy, or getting a vpn. Currently I use a VPN which allows me to tunnel my internet traffic through a different ip address (mine being located in Switzerland). Software like hidemynet.com or an internet website like http://hidemyass.com/ will actually help you bypass blocked websites.
These services are also great for hiding from your workplace what you are really doing on the internet. They won’t be able to see that you really spent half the day searching YouTube.
