diff --git a/lib/svtplay_dl/fetcher/hds.py b/lib/svtplay_dl/fetcher/hds.py
index fa59271..ad25114 100644
--- a/lib/svtplay_dl/fetcher/hds.py
+++ b/lib/svtplay_dl/fetcher/hds.py
@@ -52,6 +52,9 @@ def hdsparse(options, manifest):
         bootstrapIter = xml.iter("{http://ns.adobe.com/f4m/1.0}bootstrapInfo")
         mediaIter = xml.iter("{http://ns.adobe.com/f4m/1.0}media")
 
+    if xml.find("{http://ns.adobe.com/f4m/1.0}drmAdditionalHeader") is not None:
+        log.error("HDS DRM protected content.")
+        return
     for i in bootstrapIter:
         if "id" in i.attrib:
             bootstrap[i.attrib["id"]] = i.text
diff --git a/lib/svtplay_dl/service/bigbrother.py b/lib/svtplay_dl/service/bigbrother.py
index 6e5feae..128942d 100644
--- a/lib/svtplay_dl/service/bigbrother.py
+++ b/lib/svtplay_dl/service/bigbrother.py
@@ -52,8 +52,9 @@ class Bigbrother(Service):
             if i["defaultURL"].endswith("f4m"):
                 manifest = "%s?hdcore=3.3.0" % i["defaultURL"]
                 streams = hdsparse(copy.copy(options), manifest)
-                for n in list(streams.keys()):
-                    yield streams[n]
+                if streams:
+                    for n in list(streams.keys()):
+                        yield streams[n]
 
             if i["defaultURL"].endswith("m3u8"):
                 streams = hlsparse(i["defaultURL"])
diff --git a/lib/svtplay_dl/service/dr.py b/lib/svtplay_dl/service/dr.py
index 920bcaf..48fa2a7 100644
--- a/lib/svtplay_dl/service/dr.py
+++ b/lib/svtplay_dl/service/dr.py
@@ -44,8 +44,9 @@ class Dr(Service, OpenGraphThumbMixin):
                     if stream["Target"] == "HDS":
                         manifest = "%s?hdcore=2.8.0&g=hejsan" % stream["Uri"]
                         streams = hdsparse(copy.copy(options), manifest)
-                        for n in list(streams.keys()):
-                            yield streams[n]
+                        if streams:
+                            for n in list(streams.keys()):
+                                yield streams[n]
                     if stream["Target"] == "HLS":
                         streams = hlsparse(stream["Uri"])
                         for n in list(streams.keys()):
diff --git a/lib/svtplay_dl/service/nrk.py b/lib/svtplay_dl/service/nrk.py
index b531f82..d288493 100644
--- a/lib/svtplay_dl/service/nrk.py
+++ b/lib/svtplay_dl/service/nrk.py
@@ -53,5 +53,6 @@ class Nrk(Service, OpenGraphThumbMixin):
 
         manifest_url = "%s?hdcore=2.8.0&g=hejsan" % manifest_url
         streams = hdsparse(copy.copy(options), manifest_url)
-        for n in list(streams.keys()):
-            yield streams[n]
+        if streams:
+            for n in list(streams.keys()):
+                yield streams[n]
diff --git a/lib/svtplay_dl/service/svtplay.py b/lib/svtplay_dl/service/svtplay.py
index fd6200b..bd603ea 100644
--- a/lib/svtplay_dl/service/svtplay.py
+++ b/lib/svtplay_dl/service/svtplay.py
@@ -87,8 +87,9 @@ class Svtplay(Service, OpenGraphThumbMixin):
                     parse = urlparse(i["url"])
                     manifest = "%s://%s%s?%s&hdcore=3.3.0" % (parse.scheme, parse.netloc, parse.path, parse.query)
                     streams = hdsparse(copy.copy(options), manifest)
-                    for n in list(streams.keys()):
-                        yield streams[n]
+                    if streams:
+                        for n in list(streams.keys()):
+                            yield streams[n]
             elif parse.scheme == "rtmp":
                 embedurl = "%s?type=embed" % url
                 data = get_http_data(embedurl)
diff --git a/lib/svtplay_dl/service/tv4play.py b/lib/svtplay_dl/service/tv4play.py
index 8812920..347bbb3 100644
--- a/lib/svtplay_dl/service/tv4play.py
+++ b/lib/svtplay_dl/service/tv4play.py
@@ -84,8 +84,9 @@ class Tv4play(Service, OpenGraphThumbMixin):
                         query = "?"
                     manifest = "%s%shdcore=2.8.0&g=hejsan" % (i.find("url").text, query)
                     streams = hdsparse(copy.copy(options), manifest)
-                    for n in list(streams.keys()):
-                        yield streams[n]
+                    if streams:
+                        for n in list(streams.keys()):
+                            yield streams[n]
             elif i.find("mediaFormat").text == "smi":
                 yield subtitle_smi(i.find("url").text)
 
diff --git a/lib/svtplay_dl/service/vg.py b/lib/svtplay_dl/service/vg.py
index f518688..9d46109 100644
--- a/lib/svtplay_dl/service/vg.py
+++ b/lib/svtplay_dl/service/vg.py
@@ -40,8 +40,9 @@ class Vg(Service, OpenGraphThumbMixin):
             parse = urlparse(jsondata["streamUrls"]["hds"])
             manifest = "%s://%s%s?%s&hdcore=3.3.0" % (parse.scheme, parse.netloc, parse.path, parse.query)
             streams = hdsparse(copy.copy(options), manifest)
-            for n in list(streams.keys()):
-                yield streams[n]
+            if streams:
+                for n in list(streams.keys()):
+                    yield streams[n]
         if "hls" in jsondata["streamUrls"]:
             streams = hlsparse(jsondata["streamUrls"]["hls"])
             for n in list(streams.keys()):
diff --git a/lib/svtplay_dl/service/viaplay.py b/lib/svtplay_dl/service/viaplay.py
index b622573..5be2c4a 100644
--- a/lib/svtplay_dl/service/viaplay.py
+++ b/lib/svtplay_dl/service/viaplay.py
@@ -97,8 +97,9 @@ class Viaplay(Service, OpenGraphThumbMixin):
             if filename[len(filename)-3:] == "f4m":
                 manifest = "%s?hdcore=2.8.0&g=hejsan" % filename
                 streams = hdsparse(copy.copy(options), manifest)
-                for n in list(streams.keys()):
-                    yield streams[n]
+                if streams:
+                    for n in list(streams.keys()):
+                        yield streams[n]
             else:
                 parse = urlparse(filename)
                 match = re.search("^(/[^/]+)/(.*)", parse.path)