To add a video for Franz Xaver Brixi / Organ Concerto in C major (Allegro moderato, Adagio, Allegro (Alla breve)), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Franz Xaver Brixi / Organ Concerto in C major (Allegro moderato, Adagio, Allegro (Alla breve))