This may have been mentioned somewhere in this forum already, however even if that is the case it is not easy to find:
Best video/audio quality game play I have seen so far: HD footage, in-game sound.
Besides a walk through of the map, you’ll also see the following in action:
AR (that actually kills 
)
Suppressor (that sucks 
)
Magnum
Plasma Pistol
DMR
Carbine
BR
Sniper Rifle
SAW
Beam Rifle
Auto Sentry
Jetpack
Regen Field
Thruster Pack
Hardlight shield
Grenade throw-back
Dexterity