To add a video for Anna Hachenberch Antiphonary Anonymous / Patroni digni merita, antiphon / Laudate pueri, psalm / Antiphon, just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Anna Hachenberch Antiphonary Anonymous / Patroni digni merita, antiphon / Laudate pueri, psalm / Antiphon