To add a video for Jan Ladislav Dussek / Harp Sonata in B flat major, Op. 2/1, C. D12, just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Jan Ladislav Dussek / Harp Sonata in B flat major, Op. 2/1, C. D12