Add an image URL from Media library such as Post/Product featured image.
For example:
Post featured image
On Classic Editor:
If you enable Set thumbnail video option under Video settings, you can add an external video as a post’s featured video
Add an image URL from Media library such as Post/Product featured image.
For example:
Post featured image
On Classic Editor:
If you enable Set thumbnail video option under Video settings, you can add an external video as a post’s featured video