To add a video for Samuel Capricornus / Protector in te sperantium Deus (No. 12 from Theatrum Musicum), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Samuel Capricornus / Protector in te sperantium Deus (No. 12 from Theatrum Musicum)