To add a video for Georges I. Gurdjieff/Thomas de Hartmann / 26.X.1926 [Untitled] (Hymns, Prayers & Rituals, 2nd Series, No. 27), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Georges I. Gurdjieff/Thomas de Hartmann / 26.X.1926 [Untitled] (Hymns, Prayers & Rituals, 2nd Series, No. 27)