Python YouTube Gdata Player Error

Question

Hello,

I'm trying something really simple: get a list of player urls from the youtube gdata module,

def getlist():
  index = 1
  prev = 0
  urls = []
  while True:
    uri = "http://gdata.youtube.com/feeds/api/playlists/E005D335B57338D1?start-index=%i&max-results=50" % index
    feed = yt_service.GetYouTubeVideoFeed(uri)
    for entry in feed.entry:
      urls.append(entry.media.player.url)
    if prev == len(urls): break
    prev = len(urls)
    index += 50
  return urls

However, the following error occurs when calling getlist:

>>> urls = getlist()
Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    getlist()
  File "<pyshell#1>", line 9, in getlist
    urls.append(entry.media.player.url)
AttributeError: 'NoneType' object has no attribute 'url'

I have no idea why this is happening, it worked a couple weeks ago... Any ideas?