Hello,

Sorry, but there is no video for that available.

Therefore to make the images change when a variation is selected you need to edit the variations and add images according to your needs for the variations separately.

Screenshot for Clarification: https://ibb.co/YX8MkHT

If you are trying to ask anything else then please elaborate with the help of some relevant screenshot of the specific area to check it myself and help you out accordingly.

Best Regards.