This video is about sanderlings and turnstones, looking for food on the ice.
Translated from BirdLife in the Netherlands:
On July 1 the webcams at the Spring Experience will stop. But in Greenland spring is just beginning then. Two biologists, Jeroen Reneerkens and Stefan Sand, are in that country for sanderling research. The sanderling is a migratory bird wintering in Africa and breeding in Greenland. In the Netherlands you see this little bird especially along the coast.