To add a video for Serge Jaroff / Rette, o Gott, dein Volk (after Tchikovskys 1812 Overture), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Serge Jaroff / Rette, o Gott, dein Volk (after Tchikovskys 1812 Overture)