Photomap

"Tegelijk groen" indicates that cyclists have their own green phase at these traffic lights and that they're allowed to travel in any direction on a green - including diagonal, which is demonstrated in the video.

Its is less obvious that cyclists generally get two greens per cycle of the lights.

After crossing the road in the video we proceed along Groningerstraat. This is a road in Assen of about the same width as Gilbert Road in Cambridge, but unlike Gilbert Road, room has been found here for car parking (one side only at a time) and a 3 metre wide unidirectional cycle path on each side of the road (the first bit is four metres wide and bidirectional as this is needed next to a school entrance).

There is more information about simultaneous greens here: hembrow.blogspot.com/2008/08/simultaneous-green.html

And more on Groningerstraat, including another video of the same junction, here:

hembrow.blogspot.com/search/label/groningerstraat