To add a video for Josef Matthias Hauer / Melody for celeste (Melodies and Preludes for the Well-Tempered Instrument), Op. 34, just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Josef Matthias Hauer / Melody for celeste (Melodies and Preludes for the Well-Tempered Instrument), Op. 34