This data is really for use in a 3D program such as Blender, Caligari trueSpace, etc.
However, in a 3D program it can be used to move a camera or to make
changes to an image plane. You can have the plane project your video and move the
plane about.
May I ask what you want to do?
Image de-shaker?
Match move such as set extensions?
We can direct you further if you want to share your application.
I was thinking make a 3d track motion match the motions of the txt file.
Then you could composite stuff in & have it match the motions in the camera. IE keyed shots, etc. I tried it in blender & it works great, but I'd rather do composting in Vegas vs blender.