diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeChannelLinkHandlerFactory.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeChannelLinkHandlerFactory.java
index bdc8a832e..5a2e687c9 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeChannelLinkHandlerFactory.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeChannelLinkHandlerFactory.java
@@ -46,7 +46,8 @@ public class YoutubeChannelLinkHandlerFactory extends ListLinkHandlerFactory {
             URL urlObj = Utils.stringToURL(url);
             String path = urlObj.getPath();
 
-            if (!YoutubeParsingHelper.isYoutubeALikeURL(urlObj)) { // fixme: accepts youtu.be and youtube-nocookie.com
+            if (!Utils.isHTTP(urlObj) || !(YoutubeParsingHelper.isYoutubeURL(urlObj) ||
+                    YoutubeParsingHelper.isInvidioURL(urlObj) || YoutubeParsingHelper.isHooktubeURL(urlObj))) {
                 throw new ParsingException("the URL given is not a Youtube-URL");
             }
 
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeParsingHelper.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeParsingHelper.java
index 4f0ab358b..7464b7b44 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeParsingHelper.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeParsingHelper.java
@@ -30,41 +30,25 @@ public class YoutubeParsingHelper {
     private YoutubeParsingHelper() {
     }
 
-    private static boolean isHTTP(URL url) {
-        // make sure its http or https
-        String protocol = url.getProtocol();
-        if (!protocol.equals("http") && !protocol.equals("https")) {
-            return false;
-        }
-
-        boolean usesDefaultPort = url.getPort() == url.getDefaultPort();
-        boolean setsNoPort = url.getPort() == -1;
-
-        return setsNoPort || usesDefaultPort;
-    }
-
     public static boolean isYoutubeURL(URL url) {
-        // make sure its http or https
-        if (!isHTTP(url))
-            return false;
-
-        // make sure its a known youtube url
         String host = url.getHost();
         return host.equalsIgnoreCase("youtube.com") || host.equalsIgnoreCase("www.youtube.com")
                 || host.equalsIgnoreCase("m.youtube.com");
     }
 
-    public static boolean isYoutubeALikeURL(URL url) {
-        // make sure its http or https
-        if (!isHTTP(url))
-            return false;
-
-        // make sure its a known youtube url
+    public static boolean isYoutubeServiceURL(URL url) {
         String host = url.getHost();
-        return host.equalsIgnoreCase("youtube.com") || host.equalsIgnoreCase("www.youtube.com")
-                || host.equalsIgnoreCase("m.youtube.com") || host.equalsIgnoreCase("www.youtube-nocookie.com")
-                || host.equalsIgnoreCase("youtu.be") || host.equalsIgnoreCase("hooktube.com")
-                || host.equalsIgnoreCase("invidio.us");
+        return host.equalsIgnoreCase("www.youtube-nocookie.com") || host.equalsIgnoreCase("youtu.be");
+    }
+
+    public static boolean isHooktubeURL(URL url) {
+        String host = url.getHost();
+        return host.equalsIgnoreCase("hooktube.com");
+    }
+
+    public static boolean isInvidioURL(URL url) {
+        String host = url.getHost();
+        return host.equalsIgnoreCase("invidio.us") || host.equalsIgnoreCase("www.invidio.us");
     }
 
     public static long parseDurationString(String input)
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubePlaylistLinkHandlerFactory.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubePlaylistLinkHandlerFactory.java
index 008aeb933..c5980b5eb 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubePlaylistLinkHandlerFactory.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubePlaylistLinkHandlerFactory.java
@@ -25,7 +25,7 @@ public class YoutubePlaylistLinkHandlerFactory extends ListLinkHandlerFactory {
         try {
             URL urlObj = Utils.stringToURL(url);
 
-            if (!YoutubeParsingHelper.isYoutubeURL(urlObj)) {
+            if (!Utils.isHTTP(urlObj) || !YoutubeParsingHelper.isYoutubeURL(urlObj)) {
                 throw new ParsingException("the url given is not a Youtube-URL");
             }
 
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeStreamLinkHandlerFactory.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeStreamLinkHandlerFactory.java
index 2838a52df..521fa47c3 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeStreamLinkHandlerFactory.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeStreamLinkHandlerFactory.java
@@ -85,7 +85,9 @@ public class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
             path = path.substring(1);
         }
 
-        if (!YoutubeParsingHelper.isYoutubeALikeURL(url)) {
+        if (!Utils.isHTTP(url) || !(YoutubeParsingHelper.isYoutubeURL(url) ||
+                YoutubeParsingHelper.isYoutubeServiceURL(url) || YoutubeParsingHelper.isHooktubeURL(url) ||
+                YoutubeParsingHelper.isInvidioURL(url))) {
             if (host.equalsIgnoreCase("googleads.g.doubleclick.net")) {
                 throw new FoundAdException("Error found ad: " + urlString);
             }
@@ -159,8 +161,9 @@ public class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
                 }
                 // there is no break-statement here on purpose so the next code-block gets also run for hooktube
             }
-	
-	        case "INVIDIO.US": { // code-block for hooktube.com and invidio.us
+
+            case "WWW.INVIDIO.US":
+            case "INVIDIO.US": { // code-block for hooktube.com and invidio.us
                 if (path.equals("watch")) {
                     String viewQueryValue = Utils.getQueryValue(url, "v");
                     if (viewQueryValue != null) {
@@ -169,10 +172,10 @@ public class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
                 }
                 if (path.startsWith("embed/")) {
                     String id = path.substring("embed/".length());
-            
+
                     return assertIsID(id);
                 }
-                
+
                 break;
             }
         }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeTrendingLinkHandlerFactory.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeTrendingLinkHandlerFactory.java
index 253e9cd8a..2efec7740 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeTrendingLinkHandlerFactory.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeTrendingLinkHandlerFactory.java
@@ -48,6 +48,6 @@ public class YoutubeTrendingLinkHandlerFactory extends ListLinkHandlerFactory {
         }
 
         String urlPath = urlObj.getPath();
-        return YoutubeParsingHelper.isYoutubeURL(urlObj) && urlPath.equals("/feed/trending");
+        return Utils.isHTTP(urlObj) && (YoutubeParsingHelper.isYoutubeURL(urlObj)) && urlPath.equals("/feed/trending");
     }
 }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/utils/Utils.java b/extractor/src/main/java/org/schabi/newpipe/extractor/utils/Utils.java
index d4b8db432..af3580064 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/utils/Utils.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/utils/Utils.java
@@ -120,4 +120,17 @@ public class Utils {
             throw e;
         }
     }
+
+    public static boolean isHTTP(URL url) {
+        // make sure its http or https
+        String protocol = url.getProtocol();
+        if (!protocol.equals("http") && !protocol.equals("https")) {
+            return false;
+        }
+
+        boolean usesDefaultPort = url.getPort() == url.getDefaultPort();
+        boolean setsNoPort = url.getPort() == -1;
+
+        return setsNoPort || usesDefaultPort;
+    }
 }
\ No newline at end of file