diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1ca7b118..84a85d0c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 ## Contribute to ffplayout
 
-#### **Report a bug**
+### Report a bug
 
 - Check issues if the bug was already reported.
 - When this bug was not reported, please use the **bug report** template.
@@ -8,7 +8,7 @@
     * use code blocks for config, log and command line parameters
     * text from config and logging is preferred over screenshots
 
-#### **Ask for help**
+### Ask for help
 
 When something is not working, you can feel free to ask your question under [discussions](https://github.com/ffplayout/ffplayout/discussions/categories/q-a). But please make some effort, so it makes it more easy to help. Please don't open discussion in a "WhatsApp style", with only one line of text. As a general rule of thumb answer this points:
 
@@ -19,11 +19,19 @@ When something is not working, you can feel free to ask your question under [dis
 - relevant logging output
 - current configuration (ffplayout.yml)
 
-#### **Feature request**
+#### Sample files
+If playout works normally on your system with the [provided test clips](https://github.com/ffplayout/ffplayout/tree/master/tests/assets/media_sorted), but your files produce errors and you are sure that the problem is related to ffplayout, you can provide a test file under these conditions:
+- ffmpeg can process the file normally.
+- The file is not too large, a few seconds should be enough.
+- The video doesn't contain any illegal content.
+- You have legal permission to distribute the file.
+- The content is not age restricted (no violent or sexual content).
+
+### Feature request
 
 You can ask for features, but it can not be guaranteed that this will find its way to the code basis. Try to think if your idea is useful for others to and describe it in a understandable way. If your idea is accepted, it can take time until it will be apply. In general stability goes over features, and when just a new version has arrived, it can take time to prove itself in production.
 
-#### **Create a pull request**
+### Create a pull request
 
 In general pull requests are very welcome! But please don't create features, which are to specific and helps only your use case and no one else. If your are not sure, better ask before you start.