diff --git a/video-dl.lua b/video-dl.lua
index eef505f..a33b7e3 100644
--- a/video-dl.lua
+++ b/video-dl.lua
@@ -2,7 +2,7 @@
 
 local helptext = [[Usage:
 
-  ./video-dl.lua [action] <url>
+  video-dl.lua [action] <url>
 
 [action]: What is desired.
             video (default): Highest quality video (maximum 720p).
@@ -16,6 +16,10 @@ local helptext = [[Usage:
             yt-dlp works with.
 ]]
 
+if os.execute("where yt-dlp") ~= 0 then
+  error("yt-dlp must be installed and in the path (accessible to CMD.exe)")
+end
+
 local action, url
 
 if #arg < 2 then