diff --git a/XXE Injection/README.md b/XXE Injection/README.md
index 734588e6..eb642671 100644
--- a/XXE Injection/README.md	
+++ b/XXE Injection/README.md	
@@ -68,6 +68,13 @@ Basic entity test, when the XML parser parses the external entities the result s
 
 It might help to set the `Content-Type: application/xml` in the request when sending XML payload to the server.
 
+These are different types of entities in XML:
+
+| Type             | Prefix   | Where usable                |
+| ---------------- | -------- | --------------------------- |
+| General entity   | `&name;` | Inside XML document content |
+| Parameter entity | `%name;` | Only inside the DTD         |
+
 ## Exploiting XXE to Retrieve Files
 
 ### Classic XXE
diff --git a/_LEARNING_AND_SOCIALS/YOUTUBE.md b/_LEARNING_AND_SOCIALS/YOUTUBE.md
index c00951ce..7fea856c 100644
--- a/_LEARNING_AND_SOCIALS/YOUTUBE.md
+++ b/_LEARNING_AND_SOCIALS/YOUTUBE.md
@@ -64,4 +64,3 @@
     - [EP003: Red Team | HACKING GOOGLE](https://youtu.be/TusQWn2TQxQ)
     - [EP004: Bug Hunters | HACKING GOOGLE](https://youtu.be/IoXiXlCNoXg)
     - [EP005: Project Zero | HACKING GOOGLE](https://youtu.be/My_13FXODdU)
-