How to dig up spuds

Am loving this site. Videos on how to sort my allotment out. My early potatoes keep me awake at night. Do I need to earth up again? Are any spuds actually growing? Is it all plant and no spud? None of the videos on this site stop me worrying but at least I’ll know how to dig things out of the ground when the time comes (late June probably):

How To Harvest New Potatoes