Kai sings the Mantra "Jaya Shri Krishna Chaitanya" during a satsang at Yoga Vidya Bad Meinberg, Germany. To sing along you can find this kirtan in the Yoga Vidya Songbook or here as well: Jaya Shri Krishna Chaitanya Prabhu Nityananda Shri Advaita Gadadhara Shrivasadi Gaura Bhakta Vrinda Hare Krishna Hare Krishna Krishna Krishna Hare Hare Hare Rama Hare Rama Rama Rama Hare Hare Good to know that Shri Krishna Chaitanya was an important yoga master of bhakti yoga and he made the Maha Mantra popular.