I_Make_Big_Boom

Here's the whole Halo 5 thingy from the Gameinformer issue. I didn't include the details from the pics in the article because it would take WAY TOO LONG to do. I'll just remind everyone that the details in my article may be incorrect inside the actual Gameinformer issue.
 
Oh, and you can thank Drizzy_Dan for this:
 
http://imgur.com/a/Zm0gi

Full walkthrough:
 
1: On Ascension there are 3 switches hidden around the map (or not really well hidden, but you just got look real good). Flip the first 2 switches. The flipping of the final switch will activate the Bubble Shield in the dish in the middle of the map. Activating the buttons again will activate the Bubble Shield again.
 
2: On Sanctuary there are 2 switches hanging underneath the roofs of the two main bases. They are both bright red (or color coded. I'm not sure). Shooting one of them causes a waterfall that blocks sight-lines into the bases. I don't know how many times you can activate the waterfall.
 
3: On Lockout there are 3 sets of stalactites hanging under the overhang of the mountain structure Lockout is based under: 2 on each major Base side (the Sniper base, and it's total opposite base), and 1 hanging in the middle of the map with the square breakable floor glass beneath it. Shooting any one of these stalactites causes them to fall and kill any player within it's "death radius" (the basic area the player needs to be in for the falling rock to kill them). The middle stalactite will break the glass in the middle of the map (shooting at the glass beforehand leads to the same result).
 
And of course you can remove any of these Dynamic Elements from the maps in Forge if you wish.
 
Hope this helps!

Weapon sets ARE Loadouts. I covered this in my Gamescom Recap.
 
In the meantime I'll explain that Weapon Sets are not as modified as Halo 4's and Reach's were. It's just a simple choosing of 3 different Loadouts:
 
1: Plasma Rifle
2x Stickies
 
2: Magnum
2x Frags
 
3: SMG
2x Frags
 

 

 
 
And Frank on NeoGAF did damage control and said that there WILL BE equal starts for everyone in Halo 2 Anniversary. So that's basically saying the Weapon Sets probably won't show up in every gametype.

At Comic Con it was specifically stated by 343i that you can choose to play/search for games on a single Halo game in Matchmaking.
 
I'm not sure how this is accomplished though.

It's your connection. The videos only work if your connection is good.
 
I've experienced exactly what you have, and the only way to fix it is to have an adequate online connection.
 
I suggest looking up the videos online if you don't have the means to better your internet.

It's not working anymore. I just tried the promo code, and it says it's invalid.

"AAAAAAAHH I shouldn't have eaten those tacos!"

Half the time teammates in Halo 4 are horrible agents of destruction who go about doing their own thing 100% of the time. I have occasionally been matched with players who are supportive, but in my opinion it's not common.
 
In FFA you can talk smack on everyone, but in Team Slayer it's not an option: Well unless you're in a Chat party, like @Rockubot says, with some of the other players on the other team.