diff --git a/contrib/tools/archive/nntparchive/archiver.py b/contrib/tools/archive/nntparchive/archiver.py
index b5dbdb5..3ba4e95 100755
--- a/contrib/tools/archive/nntparchive/archiver.py
+++ b/contrib/tools/archive/nntparchive/archiver.py
@@ -83,7 +83,10 @@ class Article:
         msg += '\n'
         msg += self.message() + '\n'
         msg += '--{}\n'.format(self.boundary)
-        msg += 'Content-Type: image/{}\n'.format(self.j['ext'])
+        mtype = 'image'
+        if self.j['ext'] in ['.mp4', '.webm']:
+            mtype = 'video'
+        msg += 'Content-Type: {}/{}\n'.format(mtype, self.j['ext'])
         msg += 'Content-Disposition: form-data; filename="{}{}"; name="import"\n'.format(self.j['filename'], self.j['ext'])
         msg += 'Content-Transfer-Encoding: base64\n'        
         msg += '\n'