+ urls = cls._extract_brightcove_urls(webpage)
+ return urls[0] if urls else None
+
+ @classmethod
+ def _extract_brightcove_urls(cls, webpage):
+ """Return a list of all Brightcove URLs from the webpage """
+
+ url_m = re.search(r'<meta\s+property="og:video"\s+content="(http://c.brightcove.com/[^"]+)"', webpage)
+ if url_m:
+ url = unescapeHTML(url_m.group(1))
+ # Some sites don't add it, we can't download with this url, for example:
+ # http://www.ktvu.com/videos/news/raw-video-caltrain-releases-video-of-man-almost/vCTZdY/
+ if 'playerKey' in url:
+ return [url]
+
+ matches = re.findall(