I'm not sure if you can search for MAGFest videos on Youtube or Facebook, but here are some of the stuff I played while at MAGFest, sometimes alone with my Melodica, and sometimes with musician friends:
-Minnie the Moocher (Jazz tune with my friend Alyssa at the Sax)
-The Smash 4 Melody (just jamming about, with a sax and trumpet, in Sax-friendly keys)
-The Dark Overworld from Zelda III - alone
-"Wind Scene" - 600AD - with a Flute and a Clarinet
-A lot of my Castlevania 1 tunes I can actually play on the keys.
-Lost Painting from Symphony of the Night - Alone on the keys of the Melodica.
FYI for those who don't know, this is a Melodica:
This is the Hohner model I own, and it's an easy instrument to carry when you don't want to carry around electronic equipment but want something with a keyboard to play on.
Here's a SUPER-KICKASS VideoGame-related Melodica video by the Human Jukebox:
Human Jukebox Video Games Melodica