This is an Entoloma aprile video.
Translated from the Dutch Mycological Society:
Wednesday, May 27th, 2015
During a walk in the Egmonderhout park west of Alkmaar some mushroom lovers found Entoloma aprile mushrooms. This find is new to North Holland province. Entoloma aprile had not been seen in North Holland for more than 25 years, and is currently known only from 12 other sites in the Netherlands.