[wat] fix the extraction of the video url (fixes #1103)

Use the direct download link for Android.

youtube_dl/extractor/tf1.py

@@ -6,16 +6,12 @@ import re
 from .common import InfoExtractor
 
 class TF1IE(InfoExtractor):
-    """
-    TF1 uses the wat.tv player, currently it can only download videos with the
-    html5 player enabled, it cannot download HD videos.
-    """
-    _WORKING = False
+    """TF1 uses the wat.tv player."""
     _VALID_URL = r'http://videos.tf1.fr/.*-(.*?).html'
     _TEST = {
         u'url': u'http://videos.tf1.fr/auto-moto/citroen-grand-c4-picasso-2013-presentation-officielle-8062060.html',
         u'file': u'10635995.mp4',
-        u'md5': u'66789d3e91278d332f75e1feb7aea327',
+        u'md5': u'2e378cc28b9957607d5e88f274e637d8',
         u'info_dict': {
             u'title': u'Citroën Grand C4 Picasso 2013 : présentation officielle',
             u'description': u'Vidéo officielle du nouveau Citroën Grand C4 Picasso, lancé à l\'automne 2013.',