diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java
index b5940ad11..2ad2f9049 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java
@@ -888,7 +888,13 @@ public class YoutubeStreamExtractor extends StreamExtractor {
                         String streamUrl = tags.get("url");
                         // if video has a signature: decrypt it and add it to the url
                         if (tags.get("s") != null) {
-                            streamUrl = streamUrl + "&signature=" + decryptSignature(tags.get("s"), decryptionCode);
+                            if (tags.get("sp") == null) {
+                                // fallback for urls not conaining the "sp" tag
+                                streamUrl = streamUrl + "&signature=" + decryptSignature(tags.get("s"), decryptionCode);
+                            }
+                            else {
+                                streamUrl = streamUrl + "&" + tags.get("sp") + "=" + decryptSignature(tags.get("s"), decryptionCode);
+                            }
                         }
                         urlAndItags.put(streamUrl, itagItem);
                     }