This video from Britain is called Separating Short-eared and Long-eared Owls.
Translated from Natuurmonumenten conservation organisation in the Netherlands:
Monday, July 21, 2014 11:11
Unique: Five owlets were born from a nesting pair of short-eared owls in Skrok nature reserve. Unique to the Frisian area, 10km north of Sneek. It is certainly twenty years since breeding short-eared eared owls had been observed there for the last time.
Ranger Sander Veenstra: “Now that we know this, we will definitely not mow this plot in the coming weeks.” …
“It’s a good short-eared owl year. This year there is a surplus of mice. And that is visible. In the nest of this couple there are mice which have not even been eaten. The parents have made a sort of a pantry. The owlets can use this as well in the coming months. In a few weeks’ time, they will fly off. A unique event for Skrok,” says ranger Sander Veenstra.