To add a video for Johann Christian Schieferdecker / Concert Overture No. 9 in G minor (from 12 Musicalische Concerte), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Johann Christian Schieferdecker / Concert Overture No. 9 in G minor (from 12 Musicalische Concerte)