Autoplay Video on Hover

Hi guys,

Bit of a newbie here. Looking to create a video that stays still, but then autoplays on hover. I’ve noticed this has been asked and answered before, but I do not exactly understand how to go about doing what is required.

See link below -

Is there anyone who is able to break what this guy is saying into actionable steps (assuming it still works?)

Cheers, TIA.