General Software ProblemsQuality not quite what you expected? Need help with video capture, editing, encoding or playback. Post here for software not covered elsewhere.
now firstly why would your video be 3GB if it is only 2Mins
in order to convert it you need to open your 3gb video in your video editing program, (i.e.) Magix movie edit pro(which i use)
import the video then export it as an AVI and under the compression options choose XVid and export it.
i usually find that this method is plain and simple and it can reduce the file size by about 10x its original value and still maintains a high quality standard.