[nbc] Use NBC's id and fix _TESTS

ThePlatform URL gives the same ID for all _TESTS

youtube_dl/extractor/nbc.py

@@ -19,32 +19,39 @@ class NBCIE(InfoExtractor):
     _TESTS = [
         {
             'url': 'http://www.nbc.com/the-tonight-show/segments/112966',
-            # md5 checksum is not stable
             'info_dict': {
-                'id': 'c9xnCo0YPOPH',
+                'id': '112966',
-                'ext': 'flv',
+                'ext': 'mp4',
                 'title': 'Jimmy Fallon Surprises Fans at Ben & Jerry\'s',
                 'description': 'Jimmy gives out free scoops of his new "Tonight Dough" ice cream flavor by surprising customers at the Ben & Jerry\'s scoop shop.',
             },
+            'params': {
+                # m3u8 download
+                'skip_download': True,
+            },
         },
         {
             'url': 'http://www.nbc.com/the-tonight-show/episodes/176',
             'info_dict': {
-                'id': 'XwU9KZkp98TH',
+                'id': '176',
                 'ext': 'flv',
                 'title': 'Ricky Gervais, Steven Van Zandt, ILoveMakonnen',
                 'description': 'A brand new episode of The Tonight Show welcomes Ricky Gervais, Steven Van Zandt and ILoveMakonnen.',
             },
-            'skip': 'Only works from US',
+            'skip': '404 Not Found',
         },
         {
             'url': 'http://www.nbc.com/saturday-night-live/video/star-wars-teaser/2832821',
             'info_dict': {
-                'id': '8iUuyzWDdYUZ',
+                'id': '2832821',
-                'ext': 'flv',
+                'ext': 'mp4',
                 'title': 'Star Wars Teaser',
                 'description': 'md5:0b40f9cbde5b671a7ff62fceccc4f442',
             },
+            'params': {
+                # m3u8 download
+                'skip_download': True,
+            },
             'skip': 'Only works from US',
         },
         {
@@ -66,7 +73,11 @@ class NBCIE(InfoExtractor):
             webpage, 'theplatform url').replace('_no_endcard', '').replace('\\/', '/')))
         if theplatform_url.startswith('//'):
             theplatform_url = 'http:' + theplatform_url
-        return self.url_result(smuggle_url(theplatform_url, {'source_url': url}))
+        return {
+            '_type': 'url_transparent',
+            'url': smuggle_url(theplatform_url, {'source_url': url}),
+            'id': video_id,
+        }
 
 
 class NBCSportsVPlayerIE(InfoExtractor):