config_url = compat_urllib_parse.unquote(self._html_search_regex(
r'''(?x)
(?:
- <param\s+name="flashvars"\s+value="config=|
+ <param\s+name="flashvars".*?\s+value="config=|
flashvars="config=
)
- ([^"&]+)
+ (https?://[^"&]+)
''',
webpage, 'config URL'))