[theplatform] Fix for python 2.6

At least single depth level extraction...

youtube_dl/extractor/theplatform.py

@@ -42,8 +42,8 @@ class ThePlatformIE(InfoExtractor):
             # rtmp download
             'skip_download': True,
         },
-        # from http://www.cnet.com/videos/tesla-model-s-a-second-step-towards-a-cleaner-motoring-future/
     }, {
+        # from http://www.cnet.com/videos/tesla-model-s-a-second-step-towards-a-cleaner-motoring-future/
         'url': 'http://link.theplatform.com/s/kYEXFC/22d_qsQ6MIRT',
         'info_dict': {
             'id': '22d_qsQ6MIRT',
@@ -128,7 +128,7 @@ class ThePlatformIE(InfoExtractor):
         head = meta.find(_x('smil:head'))
         body = meta.find(_x('smil:body'))
 
-        f4m_node = body.find(_x('smil:seq//smil:video'))
+        f4m_node = body.find(_x('smil:seq//smil:video')) or body.find(_x('smil:seq/smil:video'))
         if f4m_node is not None and '.f4m' in f4m_node.attrib['src']:
             f4m_url = f4m_node.attrib['src']
             if 'manifest.f4m?' not in f4m_url:
@@ -141,7 +141,7 @@ class ThePlatformIE(InfoExtractor):
             formats = []
             switch = body.find(_x('smil:switch'))
             if switch is None:
-                switch = body.find(_x('smil:par//smil:switch'))
+                switch = body.find(_x('smil:par//smil:switch')) or body.find(_x('smil:par/smil:switch'))
             if switch is None:
                 switch = body.find(_x('smil:par'))
             if switch is not None:
@@ -162,7 +162,7 @@ class ThePlatformIE(InfoExtractor):
                         'vbr': vbr,
                     })
             else:
-                switch = body.find(_x('smil:seq//smil:switch'))
+                switch = body.find(_x('smil:seq//smil:switch')) or body.find(_x('smil:seq/smil:switch'))
                 for f in switch.findall(_x('smil:video')):
                     attr = f.attrib
                     vbr = int(attr['system-bitrate']) // 1000