Claude Debussy (1862-1918) died in 1918, about 5 years earlier, setting this episode in about 1923. In 1923, $50,000 is worth nearly $750,000 in 2020. (If it were $50,000 in gold, it would be $4.25 million.)
Niels Henrik Bohr (1885-1962) received the Nobel Prize in Physics on 10 December 1922 "for his services in the investigation of the structure of atoms and of the radiation emanating from them." At the time, Bohr was the youngest ever recipient at 37 years old. Albert Einstein received the award the previous year (although not for his theories of relativity).
Concertos are written for a solo instrument and an orchestra. One piece of sheet music can't contain all the music and all of the parts for all of the instruments. It could be a very short sonata, however. There's not enough room here to catalogue all the inaccuracies and clumsiness. The "false notes", so to speak, in this episode make it embarrassing to watch.