docs

docs/screencasts.md

@@ -17,8 +17,8 @@ In the screencast below we learn about the benefits of route-specific middleware
 
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-### Route Placeholder Preconditions
+### Route Param Preconditions
 
-Learn about route placeholder (_/user/:id_) pre-conditions, allowing validation, and loading of data via the named route placeholder segments.
+Learn about route parameter (_/user/:id_) pre-conditions, providing automated validation, and loading of data via the named route param segments.
 
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