[extractor/common] Add support for dl8-* media tags (closes #27283)

youtube_dl/extractor/common.py

@@ -2513,7 +2513,8 @@ class InfoExtractor(object):
         # amp-video and amp-audio are very similar to their HTML5 counterparts
         # so we wll include them right here (see
         # https://www.ampproject.org/docs/reference/components/amp-video)
-        _MEDIA_TAG_NAME_RE = r'(?:amp-)?(video|audio)'
+        # For dl8-* tags see https://delight-vr.com/documentation/dl8-video/
+        _MEDIA_TAG_NAME_RE = r'(?:(?:amp|dl8(?:-live)?)-)?(video|audio)'
         media_tags = [(media_tag, media_type, '')
                       for media_tag, media_type
                       in re.findall(r'(?s)(<%s[^>]*/>)' % _MEDIA_TAG_NAME_RE, webpage)]

youtube_dl/extractor/generic.py

@@ -2466,7 +2466,9 @@ class GenericIE(InfoExtractor):
         # Sometimes embedded video player is hidden behind percent encoding
         # (e.g. https://github.com/ytdl-org/youtube-dl/issues/2448)
         # Unescaping the whole page allows to handle those cases in a generic way
-        webpage = compat_urllib_parse_unquote(webpage)
+        # FIXME: unescaping the whole page may break URLs, commenting out for now.
+        # There probably should be a second run of generic extractor on unescaped webpage.
+        # webpage = compat_urllib_parse_unquote(webpage)
 
         # Unescape squarespace embeds to be detected by generic extractor,
         # see https://github.com/ytdl-org/youtube-dl/issues/21294