To add a video for Arcangelo Corelli / Sonate da camera a tre, for 2 violins & violone in B flat major, Op. 4/9, just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Arcangelo Corelli / Sonate da camera a tre, for 2 violins & violone in B flat major, Op. 4/9