Any machine that is part of our corporate network doesn’t want to display the video feed in browser window. I have noticed that on other machines that ‘allow’ and ‘allow always’ have different effects on the functionality of the preview, and sometimes the browser needs to be re-started. I’m still unable to view the stream using VLC on the camera.

This question is assuming the corporate network may have a policy blocking the plug-in.

Answer: It sounds like there is potentially a policy enabled to disable plugins? To view the camera video stream through a browser you will need to use the VLC plugin that should be prompted at start of the web page. If the plugin is not prompting to be installed that your corporate network has plugin's disabled and you will not be able to view the live video stream in the camera GUI. You should still be able to to use full control and preset SET/Go functionality.