To add a video for William Hurlstone / Mazurka for piano in G major (arrangement of Wieniawskis Sielanka, Op. 12/2), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for William Hurlstone / Mazurka for piano in G major (arrangement of Wieniawskis Sielanka, Op. 12/2)