Blissfull Festival at Rasamrita Kunj, Mayapur (6 min. video)
Srila Prabhupada: This chanting of Hare Krishna is welfare work for all sentient beings, even the worms, the microbes, the cockroaches. So many living entities are in this room and by hearing this vibration of Hare Krishna mantra they will also derive benefit. (Lecture on Bhagavad-gita, 5.17-24, Los Angeles, 1969)
Watch it here: https://is.gd/DrvC66