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I had another look through the link you mentioned and found this procedure from one of the contributors:
Add a command line switch (CLS) to the desktop shortcut of Chrome:
completely close Chrome
How to close Chrome completely:
close all windows of Chrome
open the Windows Task Manager [ctrl + shift + esc]
if you see any open Chrome processes (chrome.exe), end them
right click the desktop icon of Chrome
click 'properties'
insert the CLS at the right end of the target field (also copy the leading space):
--enable-features=RunVideoCaptureServiceInBrowserProcess
click the "OK" button
It didn't work inserting the words in the 'target field', but I tried again loading it into the 'comments' field, which seems to have worked.
Thanks again.
It may be worth checking the status of "Permissions" after a Windows Update - MS has been known to revert to defaults in the past.