To add a video for Georges I. Gurdjieff/Thomas de Hartmann / 13.III.1927 [Untitled] (Hymns, Prayers & Rituals, 3rd Series, No. 49), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Georges I. Gurdjieff/Thomas de Hartmann / 13.III.1927 [Untitled] (Hymns, Prayers & Rituals, 3rd Series, No. 49)