Is light a wave or a particle?

2015 was the International Year of Light. In May, I came across this video by the Max Planck Society, in which some random people on the street in Munich were asked whether light is a wave or a particle. Most of them answered in German, but here is a rough translation of their replies:
�Uh, physics. It's been a long time. I guess it�s... a particle. � Particle. � Particle. � A particle. � A