Updated Reconstruction from Video (markdown)

Reconstruction-from-Video.md

@@ -1,5 +1,7 @@
 # Introduction
 
+**Note: This is an experimental feature**
+
 It is possible to build a reconstruction using a video file instead of still images.  The technique for reconstructing the camera trajectory from a video is called Simultaneous Localization And Mapping (SLAM).  OpenDroneMap uses the opensource [ORB_SLAM2](https://github.com/raulmur/ORB_SLAM2) library for this task.
 
 We will explain here how to use it.  We will need to build the SLAM module, calibrate the camera and finally run the reconstruction from a video.