The young man is the dissident Marcelino Abreu and the location is Obispo Street, one of the main tourist streets in Old Havana. In video he can be heard shoulding “Abajo Fidel!” (Down with Fidel!), “Vivan los Derechos Humanos!” (Long live human rights!). His arrest can be seen at the end of the video. His whereabouts are unknown.
(Video shot on Fidel Castro’s birthday, 13 August 2012)