To add a video for Adriaen Valerius / Lachrimae Pavan (after Dowland; from the Nederlandtsche gedenck-clanck), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Adriaen Valerius / Lachrimae Pavan (after Dowland; from the Nederlandtsche gedenck-clanck)