As someone who owns and plays the game (on a semi regular basis) I think this game entertains me more than the movie. And if it entertains, you have a game (movie= observational entertainment, game= interactive entertainment)
The small size of the vid don't do the game justice. Sure it has it's little graphics nips but ingame, your heart can skip a beat sometimes (granted, not in the few cutscenes and if you can run the game on high settings, even Crysis looks like shit when on low or medium)
The game has the trademark flavor of rushed development and premature release, they wanted it our BEFORE the movie, and so they did. You can see it most when you compare some of the dialog to the mission objectives. It's clear a fair bit was cut to meet the deadline (most notably from the RDA storyline). Not to mention the multiplayer hasn't been given a proper balance overhaul.
As for backstory, you get most of it via your PandoraPedia. You basically can analyze every NPC and most plants for an article. Some are nice, some cheap. In the end I think that is WAY better than endless exposition from some NPC.