update docs

README.md

@@ -35,7 +35,7 @@ jvcl my-spec.jvcl
 ```
 Yes, the JVCL is longer, but I think many would agree it is easier to read and maintain.
 
-**As the number of input assets and operations grows, hand-crafted shell scripts with magical
+**As the number of media assets and operations grows, hand-crafted shell scripts with magical
 ffmpeg incantations become ever more inscrutable.**
 
 JVCL is designed for readability and maintainability. JVCL will continue to evolve towards greater