This is an otter video from Poland.
Translated from Alterra Wageningen in the Netherlands:
Friday, November 20th, 2015
The number of otters in the Netherlands has again increased last year, as evidenced by the latest monitoring data, from the winter of 2014/2015, which are now available. However, this does not apply to the spatial distribution, otters have barely expanded into new areas. There is mainly compaction in the areas where the otter already occurred. Unlike in previous years, there was no further loss of genetic variation due to inbreeding.