Not able to play 13Mb video file I have developed a video which approximates to 13 Mb.I try opening it with Windows media player or Nero.It tries to open but then the player automatically closes.

Format is .avi

What could be the possible reason.Is size the issue?
Not enough info. Try getting a copy of the GSpot Codec Information program (google it) and report back here what it says about the file.

Size is almost certainly not the problem.