To add a video for Kotaro Fukuma / Erbarme dich, mein Gott (from Bachs Matthäuspassion, BWV 244), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Kotaro Fukuma / Erbarme dich, mein Gott (from Bachs Matthäuspassion, BWV 244)