[twitter:card] Add add_ie for the external test

diff --git a/youtube_dl/extractor/twitter.py b/youtube_dl/extractor/twitter.py
index afbe8a651c22e6607b8c5e33e45248c8f4ce94b4..05504734046a1ff9cb2221e21510d7d3d9968dae 100644 (file)
--- a/youtube_dl/extractor/twitter.py
+++ b/youtube_dl/extractor/twitter.py
@@ -52,6 +52,7 @@ class TwitterCardIE(InfoExtractor):
                 'uploader': 'OMG! Ubuntu!',
                 'uploader_id': 'omgubuntu',
             },
+            'add_ie': ['Youtube'],
         },
         {
             'url': 'https://twitter.com/i/cards/tfw/v1/665289828897005568',