Here's adirect link link to the song, 'cradle song' : Wiegelied.
That bundle 'Kun je nog zingen, zing dan mee' (if you can sing, sing along) was standard issue for primary schools. Contrary to its subtitle these were not generally wellknown songs and if they were it was because children were forced to sing them. Many of the songs were/are set in an archaic language of the 19th century and there's a great deal of flagwaving and nationalism wafting off the pages. Everything was bright, heroic and happy in the Nethercountries, enough to put you off singing for life.
As Grishka pointed out, Antheunis was a Belgian and the use of words is distinctly Flemish.