“Thanks for this great video! I’m sorry I have one word of critic. This concerns the chapter about Mengelberg. The first item ‘Wilhelmus’ from 1935 was with the Residentie- Orkest the Hague and not the RCO. The Tchaikovsky 5 footage from 1943 isn’t the RCO at all, probably Mengelberg was guest conducting during the war in Budapest.” (YT viewer)