Is there a way to stop inline video clips from playing on MacOS Safari? My question applies to the desktop version of Safari, either as proper content (for example, supporting a news story) or inline video ads. The iOS/iPadOS version of this question doesn’t work for desktop Safari.

Is there a way on macOS to disable auto play of video?
Found on Apple Communities : Stop auto play HTML5 in Safari?


  Open Terminal and enter this command:
  defaults write com.apple.Safari IncludeInternalDebugMenu 1  
  
  That will unhide Safari's "Debug" menu.  Under that menu, go to Media
  Flags, and then select Disallow Inline Video.   This will stop videos
  from automatically playing when a page loads.


Just tested on Facebook - works.