through the house, not a creature was stirring, not even a mouse. actually, that's not true at all. [ horns honk ] metro manila. bustling, sprawling south east asian capital city of the philippines. home to somewhere between 12 to 20 million people. the world's most densely populated city. ♪ i light a candle, put the presents around the tree ♪ but it is christmas. a twinkly, festive wonderland where the mostly catholic population take their holiday season very seriously. >> woman: hello! merry christmas. >> anthony: because filipinos are, for reasons i have yet to figure out, probably the most giving of all people on the planet. think i'm talking shit? keep watching.