Lecture Capture Live uses Adobe Flash video streaming technology. In some corporate environments, video streaming technology may be blocked by the corporate firewall. Check with your system administrator to see if video streaming using RTMP has been blocked. This is unlikely to be the case for a home user with a normal domestic internet connection.
If your system administrators are unable or unwilling to remove the block on RTMP video streaming and the video is hosted on a website outside of your organisation, please contact the hosting organisation and suggest that they follow the advice on the "Dealing with networks which block access to rtmp servers" item in this support database.