OT: Does anyone know of a setting or extension for Firefox to stop those autoplaying videos? I have gifs disabled, prefers-reduced-motion on, and those videos in that article both autoplay, and start again after pausing them manually. I have no idea what the article is about (except what the title says) because I kept getting distracted by the annoying videos.

Settings => Search for "Autoplay" => Click "Settings..." => For "Default for all websites" select "Block Audio and Video".