To add a video for Ernesto Cavallini / Capriccio for clarinet No. 19 in F major (Tema e variazioni), Op. 4/6, just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Ernesto Cavallini / Capriccio for clarinet No. 19 in F major (Tema e variazioni), Op. 4/6