To add a video for Claudio Merulo / Toccata for organ No. 6 in tone 7 (Toccate dintavolatura dorgano, Book 2), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Claudio Merulo / Toccata for organ No. 6 in tone 7 (Toccate dintavolatura dorgano, Book 2)