ENH added _repr_jpeg_ method for YouTubeVideo object to allow conversion

to latex and pdf.

IPython/lib/display.py

@@ -255,8 +255,12 b' class YouTubeVideo(IFrame):'
     """
 
     def __init__(self, id, width=400, height=300, **kwargs):
+        self.id=id
         src = "https://www.youtube.com/embed/{0}".format(id)
         super(YouTubeVideo, self).__init__(src, width, height, **kwargs)
+    def _repr_jpeg_(self):
+        from urllib import urlopen
+        return urlopen("https://img.youtube.com/vi/{id}/0.jpg".format(id=self.id)).read()
 
 class VimeoVideo(IFrame):
     """