[cbsnews] fix extraction(closes #9659)(closes #15397)

youtube_dl/extractor/extractors.py

@@ -173,6 +173,7 @@ from .cbs import CBSIE
 from .cbslocal import CBSLocalIE
 from .cbsinteractive import CBSInteractiveIE
 from .cbsnews import (
+    CBSNewsEmbedIE,
     CBSNewsIE,
     CBSNewsLiveVideoIE,
 )