The first live stream is currently being held since the game's been released, so I thought it'd be a good idea to make a thread compiling live stream pages and certain videos of P4A2:

First Live Streams

Nico Nico link (click on "watch") [No longer accessible]

Restream #1

Restream #2

Nico Nico link for 2nd stream

Other Live Steams

Ustream

Archives

Jourdal Youtube page

Loketesuto Youtube page

FFxStrife Youtube page

P4U2 video index

Arcade Specific

Official arcade opening

Persona Sho Playthrough [1/2]

Persona Sho Playthrough [2/2]

Complete Labrys playthrough

Gameplay

Akihiko vs. Sho and Yukari [Great quality]

Tokyo Leisureland Launch Singles Tournament [3 hours]

Stream archive [4.5 hours]

Yukiko, Yukari, Elizabeth, Akihiko, Naoto [Great quality]

a-cho (2013-12-03) [1h45m]

Game Chariot 1 and Game Chariot 2 (2013-12-03)

Official P4A2 exhibition matches

Junpei mirrors

Story

Yu final boss + arcade mode final cutscene

Score Attack

Yukiko on Risky difficulty - Course C part 2

Character Showcase (alt colors, attacks, etc.)

Yukari, Junpei and Sho (Moves and alt colors)

Sho tutorial

Persona Sho Minazuki

Persona Sho's Insta Kill

Combos

Yukari Day 1

Yukari combos

Yukari combos #2

Naoto Almost-100% combo

Yu combo

Labrys combos

Aigis combos

Aigis combos #2

Elizabeth combos

Yukiko combos

Yukiko combo video

Shadow Yu Shadow Fury combos

Shadow Naoto combos

Shadow Labrys combos

Shadow Labrys combos #2

Sho combos

Persona Sho OMB combos

Bugs

Elizabeth making opponent permanently disappear for a whole round

Yukari crazy damage glitch

Yosuke flight mode + Garudyne glitch

Naoto OMC hopping

Aigis DP > OMC

Chie infinite lunge punch

Soundtrack

Main theme (with some background noise)

I don't think you have it on your list but FFxStrife's youtube channel has some videos of matches too. Some videos might be the same from other channels.

Seems like most of that stuff has already been included, but that person does a real poor job of sourcing the original source for their reuploads.

Xie just uploaded his Junpei combo video on Nico Nico. He also said this.