diff --git a/handle_imported_video.py b/handle_imported_video.py
index 2c67874..d9b3597 100644
--- a/handle_imported_video.py
+++ b/handle_imported_video.py
@@ -158,7 +158,7 @@ def add_overlay(_DEV,_SOURCE_DIR,_DAY_DIRS):
                 else:
                     continue
             if filename.endswith(".MP4") and filename.startswith("joined_"):
-                myCmd = f"ffmpeg -i {filename}  -c:v libvpx-vp9 -i {filename.replace('.MP4', '.MOV')} -filter_complex [0][1]overlay=x=0:y=0,hflip,vflip overlay_{filename}"
+                myCmd = f"ffmpeg -i {filename}  -c:v libvpx-vp9 -i {filename.replace('.MP4', '.WEBM')} -filter_complex [0][1]overlay=x=0:y=0,hflip,vflip overlay_{filename}"
                 print(myCmd)
                 status, output = subprocess.getstatusoutput(myCmd)
                 print(output)