This video is called Dutch Butterflies Part 7: 3 Fritillaries and the Wall Brown.
Translated from NOS TV in the Netherlands:
Small tortoiseshell most counted butterfly
Sunday, August 3 2014, 19:10 (Update: 03-08-14, 19:16)
The last few days in Dutch gardens more than fifty thousand butterflies were counted. That happened in the context of the annual Garden Butterfly Census organized by Butterfly Conservation.
The small tortoiseshell was counted thirteen thousand times, the red admiral ten thousand times, and the small cabbage white five thousand times.
See also here.
Wall brown butterflies in the Netherlands: here.