Update README.md

README.md

@@ -72,6 +72,7 @@ $ youtube-upload \
   --client-secrets=my_client_secrets.json \
   --credentials-file=my_credentials.json \
   --playlist "My favorite music" \
+  --embeddable=True|False \
   anne_sophie_mutter.flv
 tx2Zb-145Yz
 ```