You cannot create a 3D model from a 2D video in After Effects. What you are asking is very difficult to do automatically with any kind of software. The easiest way to recreate your object in 3D is to find a side and top view of the object, grab some still frames and use them as a reference to build the model in a modeling app like Blender (free) or C4D (not the Light version that comes with AE).
It can't be done simply because there is no such app or feature. Aside from a few SIGGRAPH research papers there simply is nothing. All photogrammetry tools/ 3D reconstruction tools otherwise operate on photos and require manual work... sorry kid, you're 20 years too early with your idea...
Oh well, but thanks. That's what I was thinking. Finding sides and use em to build the model although that won't be perfect but it will work just fine. There's an alternative, which involves in hacking the file (where the model is located) and extract it, but that requires a whole different level of ball game: what if it's compressed? What if it's encrypted? Afterwards, I guess it's all about learning the file format and structure and then map the data at certain offset (s) and whatever else in order to extract the 3D model. Which can be challenging since a lot of video games use different file formats and structures.
And to the other poster, your last sentence was a bit offensive. So, no thanks to you.