To add a video for Renzo Bossi / Canzoni (8), No. 3, Canzone Mistica, Op. 23bis/3, just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Renzo Bossi / Canzoni (8), No. 3, Canzone Mistica, Op. 23bis/3