This video is called Miffy‘s birthday (official Miffy video).
Translated from NOS TV in the Netherlands:
Miffy retired in 2011
Update: Wednesday, July 30 2014, 09:09
Dick Bruna has stopped drawing. The Miffy book he published in 2011 is the last one. The Dick Bruna House says the 86-year-old artist wants to slow down, because of his age.
The first book about Miffy was in 1955, and so the last one was in 2011. They were issued all over the world. The rights will not pass on to someone else, like happened with Spike and Suzy by Willy Vandersteen.