"The media could not be loaded, either because the server or network failed or because the format is not supported" error message

If you are using Safari on macOS and you are seeing this error message when loading a previously recorded session, then there is a known issue with Safari not being able to load the video. 

You can easily rectify this by reviewing your session using Google Chrome instead. Caption.Ed has been optimised to work with Google Chrome and Chromium-based browsers.