This is probably because your organisation or network provider is blocking direct access to the Lecture Capture Live server. After a minute or so the Flash plugin will automatically fall back on alternative methods to communicate with the Lecture Capture Live Server.
In order to improve the initial speed of connection, you should contact your network administrator and ask them to allow direct access to RTMP on port 1935 of the website which is hosting the presentation(s) you are trying to watch.