Nice to see this on Youtube! I had the pleasure to listen to this concert which included Weber's Freischütz-Overture and Strauss's Horn Concerto No. 1, too. Simon Kannenberg is a fine musician and musicologist. Besides of Raff, he is very active for Ferdinand Pfohl and Felix Woyrsch. Not long ago he wrote this encyclopedia article about Pfohl (in German):
https://kulturstiftung.org/biographien/pfohl-ferdinand
https://kulturstiftung.org/biographien/pfohl-ferdinand