diff --git a/TODO.md b/TODO.md
index a9beaa6..71603fc 100644
--- a/TODO.md
+++ b/TODO.md
@@ -10,7 +10,7 @@
 - [x] set speaker-names per input-file -> prompt user for each file if flag is set (--set-speaker-names)
 - [x] fix cli output for model display
 - [x] refactor into proper cli app
-- add support for video files -> use ffmpeg to extract audio
+- [x] add support for video files -> use ffmpeg to extract audio
 - detect gpus and use them
 - add error handling
 - add verbose flag (--verbose | -v) + add logging
diff --git a/src/main.rs b/src/main.rs
index 8fbb483..3f00191 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -960,4 +960,14 @@ mod tests {
             std_env::remove_var("HOME");
         }
     }
+
+    #[test]
+    fn test_is_audio_file_includes_video_extensions() {
+        use std::path::Path;
+        assert!(is_audio_file(Path::new("video.mp4")));
+        assert!(is_audio_file(Path::new("clip.WEBM")));
+        assert!(is_audio_file(Path::new("movie.mkv")));
+        assert!(is_audio_file(Path::new("trailer.MOV")));
+        assert!(is_audio_file(Path::new("animation.avi")));
+    }
 }