[totem/mallard-documentation] Mention error message and ask distro about libdvdcss

[Andre Klapper <aklapper src gnome org>]

commit 5d3d57ea4ffff56f21a5ff8ebb94b8987a608096
Author: Andre Klapper <a9016009 gmx de>
Date:   Fri Jan 11 23:11:27 2019 +0100

    Mention error message and ask distro about libdvdcss

 help/C/troubleshooting-DVD.page | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)
---
diff --git a/help/C/troubleshooting-DVD.page b/help/C/troubleshooting-DVD.page
index d5322279..263fbe55 100644
--- a/help/C/troubleshooting-DVD.page
+++ b/help/C/troubleshooting-DVD.page
@@ -5,29 +5,37 @@
   <info>
     <link type="guide" xref="index#troubleshooting"/>
     <link type="seealso" xref="supported-formats"/>
+    <revision pkgversion="3.30" version="0.2" date="2019-01-11" status="draft"/>
     <desc>I cannot play my DVD.</desc>
     <credit type="author">
       <name>Marta Bogdanowicz</name>
       <email>majus85 gmail com</email>
     </credit>
+    <credit type="author">
+      <name>Andre Klapper</name>
+      <email>ak-47 gmx net</email>
+    </credit>
     <license>
       <p>Creative Commons Share Alike 3.0</p>
     </license>
   </info>
 
-  <title>Problem with playing movie from DVD</title>
+  <title>Problem with playing movies from a DVD</title>
 
   <p>
-  It may happen, that after putting your DVD into CD/DVD drive <app>Videos</app>
-  will not be able to play it. This may be because your DVD is encrypted and a
-  DVD decryption library is not installed. See <link xref="supported-formats"/>
-  page for more information.
+  It may happen that after putting a DVD into your CD/DVD drive, <app>Videos</app>
+  shows the error message <gui>An error occurred ‒ The movie could not be read.</gui>
+  This may be because your <link xref="supported-formats">a required 
+  <sys>GStreamer</sys> plugin to read the format of the movie is not installed
+  on your system</link>, or because DVD is encrypted and a DVD decryption package
+  is not installed on your system.
   </p>
 
   <note style="tip">
-    <p>If <app>Videos</app> still cannot play your DVD, consider installing
-    <code>libdvdcss</code>. However, notice that using this library is not legal
-    in all countries.</p>
+    <p>To open encrypted DVDs, consider installing the <sys>libdvdcss</sys>
+    package. However, note that using this package is not legal in all countries.
+    For further information if or where the package might be available for your
+    distribution, please ask in a support forum of your distribution.</p>
   </note>
 
 </page>