Having set browser integration and installed the elephant plug-in in the latest version of Chrome, I was able to do one download but now the 'download with FDM' no longer appears in the context menu of a video webpage. How can I restore functionality ?

I discovered that the PC needed to be rebooted before the context menu would offer 'Download with FDM'

BUT

what downloads is NOT a video file, but an m3u8.

So the title of my post is still valid - I did get a video, the first time tried, but not since then !
Since the video can be downloaded by another technique (VideoProc), there is no question about the source, but only the FDM download.