diff --git a/documentation/README.md b/documentation/README.md
new file mode 100644
index 00000000..5d9996f6
--- /dev/null
+++ b/documentation/README.md
@@ -0,0 +1,9 @@
+**This folder is deprecated**
+
+We only keep files in this folder to avoid dead links
+(links to these files were shared on many websites or social media posts).
+
+The source code for the new documentation is in `support/documentation`, and are used to build these websites:
+
+* [Plugin Livechat Documentation on Github](https://johnxlivingston.github.io/peertube-plugin-livechat/).
+* [Plugin Livechat Documentation on Framagit](https://livingston.frama.io/peertube-plugin-livechat/).