- deliver_url = self._search_regex(
- r'<iframe[^>]+src="(https?://(?:www\.)?ultimedia\.com/deliver/[^"]+)"',
- webpage, 'deliver URL')
+ deliver_url = self._proto_relative_url(self._search_regex(
+ r'<iframe[^>]+src="((?:https?:)?//(?:www\.)?ultimedia\.com/deliver/[^"]+)"',
+ webpage, 'deliver URL'), compat_urllib_parse_urlparse(url).scheme + ':')