To add a video for Ernesto Cavallini / Capriccio for clarinet No. 25 in B flat major, Op. 1/4, just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Ernesto Cavallini / Capriccio for clarinet No. 25 in B flat major, Op. 1/4