Download youtube as videos, not always by links as html content

boards/models/attachment/downloaders.py

@@ -88,7 +88,7 b' class NothingDownloader(Downloader):'
     def handles(url: str) -> bool:
         response_head = requests.head(url, verify=False)
         content_type = response_head.headers[HEADER_CONTENT_TYPE].split(';')[0]
-        return content_type in TYPE_URL_ONLY
+        return content_type in TYPE_URL_ONLY and not YOUTUBE_URL.match(url)
 
     @staticmethod
     def download(url: str):