diff --git a/API-Docs.md b/API-Docs.md
index 07fe980..cdae486 100644
--- a/API-Docs.md
+++ b/API-Docs.md
@@ -83,7 +83,7 @@ ________________________________________________________________________________
 
 **GET** `/api/skipSegments/:sha256HashPrefix`
 
-`sha256HashPrefix` is a hash of the YouTube `videoID`. It should be the first 3 - 32 characters. This provides extra privacy by potentially finding more than just the video you are looking for. This makes the server not know exactly what video you are looking for.
+`sha256HashPrefix` is a hash of the YouTube `videoID`. It should be the first 3 - 32 characters (4 is recommended). This provides extra privacy by potentially finding more than just the video you are looking for. This makes the server not know exactly what video you are looking for.
 
 **Input**:
 ```