In this Text Book you find most of the texts of the Mantras chanted in the Kirtans here. The Text Book hast German Translation and Meaning - the Sanskrit is for English-Speaking Mantra-Lovers helpful, too.
So, if you want to chant along with these Mantras, you should find them in the Text book. If you want to know the meaning, you have to learn either German or Sanskrit :-)
You can order the chant book in www.yoga-vidya.de/shop2 . More infos on www.yoga-vidya.de (English website: www.yoga-vidya.org/en).