diff --git a/CHDataManagement/Generator/Blocks/VideoBlock.swift b/CHDataManagement/Generator/Blocks/VideoBlock.swift
index 12a806d..4f7301b 100644
--- a/CHDataManagement/Generator/Blocks/VideoBlock.swift
+++ b/CHDataManagement/Generator/Blocks/VideoBlock.swift
@@ -33,6 +33,10 @@ struct VideoBlock: OrderedKeyBlockProcessor {
                 results.missing(file: fileId, source: "Video Block: \(key)")
                 continue
             }
+            guard file.type.isVideo else {
+                invalid(markdown)
+                continue
+            }
             results.require(file: file)
             let source = Source(file: file, type: sourceType)
             sources.append(source)