IGN has some detailed impressions
might be spoilers since it says what it's in the trailer
http://ps2.ign.com/articles/642/642916p1.html
The online mode will be able to support up to eight people online with five different modes of play and will have three different military groups to choose from. But instead of showing us some regular battles, Kojima Productions was clearly more interested in creating some cinematic scenes with the troops. In one of the earliest scenes, seven soldiers from the Ocelot unit run along a hallway and then all hide inside their cardboard boxes.
With everyone lying in wait, Naked Snake comes running by and one by one all of the boxes lift up and start following him as if he were the Pied Piper of cardboard. Suddenly, Naked Snake runs ahead, turns a corner and hides inside a box himself. The line of boxes rounds the corner, continues down the hallway and Naked Snake follows after the last one in his own box.
After this we see a few more scenes of groups of eight soldiers going through various maneuvers. There would never be such a large army in a game since that's the maximum amount of people for a game, but it was a pleasure to watch as Naked Snake inspected a group of soldiers as he walked up and down a line of them at attention. Later on, the soldiers paired off and Naked Snake demonstrated some CQC tactics on one before the rest copied him and left four grunts groaning on the ground afterwards.
Once the training was complete we saw various scenes of soldiers gearing up for a fight. Russian soldiers were lining up along a fallen tree and getting ready for a battle. Ocelot soldiers were running and jumping behind Revolver Ocelot across urban rooftops. In the frenzy of soldiers getting into position and reloading their weapons we could see locations that were lifted straight out of Snake Eater as well as a couple of spots that looked to be completely new. After all, where were those buildings that the Ocelot soldiers were scampering along? It's just another question that we know Kojima will refuse to answer until he's ready.
Oddly enough, the video didn't contain any direct explanations of the new modes. Besides deathmatch and team deathmatch modes there are three modes that are unique to Subsistence. These are the Capture, Rescue and Sneaking modes which all revolve around groups fighting to grab a certain item or prevent it from being taken. The Capture pits four against four in a battle to grab hold of an item on the map and hold it for a minimum amount of time where Rescue involves one group trying to move an item from one spot to the other while the other tries to stop them and get it. And as for Sneaking, that's the one vs. seven mode that's been revealed earlier where Naked Snake tries to get into a complex, grab an item, and get out.
But as for the video we didn't see much evidence of this, if at all. The Kojima team was obviously having too much fun setting up different scenes such as one where Naked Snake was caught and seven laser sights were roaming all over his body as all of the other soldiers had their guns trained on him. And then there was the scene with Naked Snake distracting a group of guards by throwing down a girly magazine or the encounter where Raikov punched Ocelot square in the crotch. It just had to be seen to be believed and we sincerely hope the trailer gets released soon so that any and all of this will make sense.
But caught up in the goofiness there were still a couple of pieces of information that were thrown in. Nearing the end of the video we see a soldier in the middle of a field of grass as all of the grass begins moving about frantically. It's not from gunshots since there are no direct lines of movement, but something else. The camera flicks over to an infrared mode and we see bodies moving all over the place. The camera flicks back and there are hazy shapes running all through the grass. When we asked about this, the official answer was, "sorry, maybe later." Ah well.
As the action came to a close the theme moved on to shots of the soldiers going through what looked like group calisthenics. Soldiers would all lean to the left and then to the right in unison or shuffle along to some rhythm. As all the journalists in the room were busting up laughing at the absurdity of it all, we almost missed the final shot of Naked Snake holding a flamethrower and glancing at the camera before the trailer cut to black and it was over. And what was that all about? "Sorry, maybe later."
