To add a video for Melchior Vulpius / De profundis clamavi ad te Domine (Pars prima Cantionum sacrarum), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Melchior Vulpius / De profundis clamavi ad te Domine (Pars prima Cantionum sacrarum)