Welsh Folk Song 'Robin Ddiog' on Mechanical Music Box

This is part of the Welsh folk song Robin Ddiog played on a programmable music box. The music box works in a similar way to a player piano. You feed the music box a piece of paper with holes punched in, and the spacing of the wholes corresponds to the notes that then sound. More info here:
http://jackwestmore.wordpress.com/2011/05/12/a-welsh-folk-song-and-a-music-box/