[dl:ytdl] implement explicit HLS/DASH handling

add '_ytdl_manifest' to specify a manifest type to process

gallery_dl/extractor/behance.py

@@ -171,6 +171,7 @@ class BehanceGalleryExtractor(BehanceExtractor):
                     url = text.extr(page, '<source src="', '"')
                     if text.ext_from_url(url) == "m3u8":
                         url = "ytdl:" + url
+                        module["_ytdl_manifest"] = "hls"
                         module["extension"] = "mp4"
                     append((url, module))
                     continue

gallery_dl/extractor/patreon.py

@@ -56,6 +56,7 @@ class PatreonExtractor(Extractor):
                     text.nameext_from_url(name, post)
                     if text.ext_from_url(url) == "m3u8":
                         url = "ytdl:" + url
+                        post["_ytdl_manifest"] = "hls"
                         post["extension"] = "mp4"
                     yield Message.Url, url, post
                 else:

gallery_dl/extractor/pinterest.py

@@ -74,6 +74,7 @@ class PinterestExtractor(Extractor):
 
                     if pin["extension"] == "m3u8":
                         url = "ytdl:" + url
+                        pin["_ytdl_manifest"] = "hls"
                         pin["extension"] = "mp4"
 
                     yield Message.Url, url, pin

gallery_dl/extractor/reddit.py

@@ -211,8 +211,9 @@ class RedditExtractor(Extractor):
     def _extract_video_dash(self, submission):
         submission["_ytdl_extra"] = {"title": submission["title"]}
         try:
-            return (submission["secure_media"]["reddit_video"]["dash_url"] +
-                    "#__youtubedl_smuggle=%7B%22to_generic%22%3A+1%7D")
+            url = submission["secure_media"]["reddit_video"]["dash_url"]
+            submission["_ytdl_manifest"] = "dash"
+            return url
         except Exception:
             return submission["url"]