Hi Tony
Well something is blocking you from being able to view videos.
There are many reasons why this could be happening but it's usually to do with security settings or possibly 3rd party software plugins to block adverts.
Without actually seeing your computer it could take a long time to track down the cause.
If you go to
www.youtube.com can you view any videos there?
Does anyone else use your computer, and if so have they added any plugins or adjusted the security settings?
If all else fails you could try and install another browser such as:
Firefox -
www.mozilla.org/en-US/firefox/new
Or
Chrome -
www.google.com/chrome
Frankly Internet Explorer is a bit rubbish anyway.
Good luck
Andy