Here I have put together the biggest guide of all the Halo 4 information I have released. I know some may say I am advertising and they are not wrong. But, I am also helping everybody out by giving them their Halo 4 fill while they greatly anticipate the game.
Ragnarok Short Gameplay
Infinity Slayer on Haven and Commentary
In Depth about Halo 4
How to kill Prometheans and Abandoned
All about Halo 4
Weapons and Tactics in Halo 4
Also Some of your questions may be answered in this thread
https://forums.halowaypoint.com/yaf_postst127964_I-have-played-Halo-4-extensively-Ask-anything.aspx
Feel free to ask more