What do I do if my render is just black? here's the link I've got a template from the internet and have been trying to render it.  However when I do so, it takes seconds but it's just a 10 second black clip.  Others that have used similar templates say it should take about an hour to render.  

What should I do to try to fix this issue? 

(I am new to using Blender so any help is appreciated!)
There is not a single light source in the file you have downloaded. Just
some animation and a few meshes. All you have to do is to add some
light source and it should render fine.

Hope that helps.