I have watched the video twice and it seemed to me that AGD was passionate and not trying to be humourous. He is passionate about art and extremely knowledgeable about a number of periods in art and the artists. He has written about and/or made tv series and films on subjects from the Vikings, through the Renaissance to the 20th and 21st centuries such as Picasso and Howard Hodgkin.
During the 19th century and the pre war 20th century the bankers, such as the Rothschilds and the Ephrussi were great collectors art. The Germans took away 19 crates of artworks from the French branch of the Rothschilds. In fact it is considered that they looted 20% of European art. 6,500 art works were recovered from the salt mines by the Allies.
No doubt Hitler would have considered "The Dance" by Matisse to be degenerate. Luckily that painting and several others were commissioned by a Russian who bequeathed them to the Hermitage.
If you are interested you can read about the rise and fall of the Ephrussi family and the losses that they suffered in the book by Edmund de Waal entitled "The Hare with the Amber Eyes"
Soops place of refuge and friends
De-cluttering, still at it, still no end



