I have never used Blender compositor but realize natron is no longer developed so I wanted to give it a go.  
Will likely need to install the lens flare plug-in and add a 3-d light. I could not get a good result just using the nodes available. 

Reset paths to images in image nodes.
Change the video output path/file on the right panel.
Unwire the viewer when rendering. It give me black video.

