To add a video for Claudio Merulo / Toccata for organ No. 7 in tone 3 (Toccate dintavolatura dorgano, Book 1), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Claudio Merulo / Toccata for organ No. 7 in tone 3 (Toccate dintavolatura dorgano, Book 1)