Yes it is checked.Look in the "places" section on the left of your Google Earth window. Is the box next to your topos checked?
the server I download in the video is not a native GE server. Sometimes you need to zoom out into space, let the topo server load then zooom back in.Well, I can't get it to work. I do as the video instructs, download the kmz file, open it to temporary files. GE shows it there, checked, but when I zoom in, no topos. I don't know what the issue is.