-0:10 Selective fire is now shown, I'm not sure if this is for certain guns or for all. Pistols along with tactical knifes are now back.
-0:10 The player has a class called "I am electro" It looks like he has 3 attachments on his primary. 2 on his secondary and 2 non lethal's. (Not sure about this finding) I had a look but its hard to know if its right or wrong.
-0:10 The point-streak counter in the corner is still there. Indicating to the player how far they are off a certain kill-streak.
-0:13 A throw-able emp device is seen.
-0:21 It is now possible to see enemies and maybe teammates behind walls. In the trailer the player looks through the optic to see the enemy approach him from around the corner. Sonar optic maybe?
-0:23 A new kill-streak named the "Lightning Strike" is called in. Possibly a missile or an airstrike of some sort.
-0:25 Dolphin Dive is OFFICIALLY back.
-0:27 Face paints are shown. Unknown if its just for the faction or it can be put on all factions.
-0:32 Hybrid sights are back.
-0:38 A portable wave emitting kill streak or piece of equipment know as the "Guardian" is used. Possibly blinding the players vision so they cannot kill the player. Much like a stun or flash grenade. Also remember the shrieker from Black Ops 1 zombies. It seems to do the same thing as the "Guardian".
-0:40 15th prestige from Black Ops 1 is seen, this may reveal that the player can carry on from their Black Ops 1 rank
-0:40 Looks like a prestige.
-0:50 Quad rotors are officially given the name "Dragon fire"
-0:56 Stingers are back. They can be used to destroy enemy aircraft and the quad-rotors.
-0.58 seconds, He takes down a dragon fire and the team points stay still - Point streaks excluded from Black Ops 2?
-1:01 Riot shields are now back, but they can now be planted into the ground and used as cover for the player.
-1:06 Highest Rank Shown (Level 55) Could be possibly changed.
-1:07 AN-94 Abakan shown.
-1:15 Ballistic Vests or Flak Jacket?
-1:15 Raging Judge is the only weapon in his class.
-1:17 The Magnum is called "Raging Judge"
-1:18 You can now run with the knife, Battlefield 3 style.
-1:20 When moving with the knife or magnum, the player seems to be moving extremely fast. Hinting that lightweight could make a return as a perk.
-1:20 Looks like a different prestige
-1:21 When the player kills his victim with a knife. A massive amount of blood is shown coming out of the victim. Possibly hinting at gore making a return. (Not confirmed)
-1:21 Attack Dogs is seen as a point/killstreak.
-1:22 Tomahawks are back with a more slick, futuristic design.
-1:26 Tactical Insertion is shown. This isn't official though. As it maybe a part of the scenery.
-1:26 - 1:34 Snipers can now be used WITHOUT scopes and used with the original iron sights.
-1:27 Quickscoping MIGHT return.
-1:37 Rapid Fire shotguns.
-1:37 The rapid fire shotgun shown appears to have a laser sight. Hinting at laser sights being an attachment.
-1:39 c4 makes a return.
-1:41 Sentry Gun killstreak in the right hand corner.
-1:46 A robotic plane is seen which can be called it to become kamikaze to kill the player along with destroying itself.
-2:00 Map revealed as "Turbine".
-2:00 Multi Team Team Deathmatch is included.
-2:05 The militia team make a return.

Throughout the whole trailer new optics can be seen.
Throughout the whole trailer customisible emblems are shown. It will be good to see what creative emblems they can make now. Hopefully they will add more layers for the emblem creator.

Pictures of classes:
0:32 Runz4FunznGunz


0:43 Flyswatter


1:14 MostlyUseMeBlade


1:25 T00b Monay - Wager Match Reference?


1:37 Shotgun Sark


A massive thank you to TTGJac for finding pictures and to iDestroy for finding a lot of information.

Comment with what you seen and I will add it.