Determine video codecs

CHDataManagement/Generator/Post Lists/PostListPageGenerator.swift

@@ -82,7 +82,18 @@ final class PostListPageGenerator {
             images.forEach(source.results.require)
             media = .images(images)
         } else if localized.hasVideos {
-            media = .video(localized.images)
+            let videos: [PostVideo.Video] = localized.images.compactMap { file -> PostVideo.Video? in
+                guard file.type.isVideo else {
+                    self.source.results.warning("File \(file.identifier) ignored due to videos present in the post")
+                    return nil
+                }
+                guard let type = file.videoType() else {
+                    self.source.results.warning("Video \(file.identifier) ignored due to unknown video type")
+                    return nil
+                }
+                return .init(path: file.absoluteUrl, type: type)
+            }
+            media = .video(videos)
             localized.images.forEach(source.results.require)
         } else {
             media = nil