At 57 mins, a very ungenerous DVD. You don't even get to hear some of the best bits like the ending of Berg piece #3. The makers could easily have squeezed in performances of all the 7 pieces.
Many of the VPO players , both young and old, looked quite uncommitted to the works. Orchestras such as Chicago Symphony and BBCSO seem better disposed to this repertoire.
Still, Boulez makes some great observations and so it's worth a watch. Try to get it through Amazon Rentals - then you don't actually have to buy it.