diff --git a/README b/README
index 1b46c762..a2069cd3 100644
--- a/README
+++ b/README
@@ -26,6 +26,7 @@ Table of Contents
 * cmake - Required to build fceux.
 * qt5 OR qt6  - (qt version >= 5.11 recommended)
 * liblua5.1 (optional) - Will statically link internally if the system cannot provide this.
+* libx264 (optional) - H.264 video encoder for avi recording
 * minizip  
 * zlib  
 * openGL
diff --git a/src/drivers/Qt/AviRecord.cpp b/src/drivers/Qt/AviRecord.cpp
index 31234de7..1845f97b 100644
--- a/src/drivers/Qt/AviRecord.cpp
+++ b/src/drivers/Qt/AviRecord.cpp
@@ -1,3 +1,25 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2020 mjbudd77
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+//
+// AviRecord.cpp
+//
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
diff --git a/web/download.html b/web/download.html
index 89741e61..1fa84030 100644
--- a/web/download.html
+++ b/web/download.html
@@ -61,6 +61,7 @@
 			<li><a href="https://cmake.org/">Cmake is required to build from source.</a></li>
 			<li>Cross platform Qt GUI replaces deprecated GTK GUI</li>
 			<li>Requires Qt5, SDL2, minizip, zlib, and OpenGL</li>
+			<li>libx264 is an optional dependency that provides H.264 video encoding for AVI recording</li>
 			<li>Lua 5.1 is optional, if the system cannot provide this, an internal version of Lua will be statically linked</li>
 			<li>The Qt GUI is required and will automatically be part of the build.</li>
 			<li>For installation instructions on Linux systems, see the README at the root level of the source tree</li>
diff --git a/web/osx.html b/web/osx.html
index 8b169216..14a51f01 100644
--- a/web/osx.html
+++ b/web/osx.html
@@ -81,6 +81,7 @@
 		 brew install qt5
 		 brew install sdl2
 		 brew install minizip
+		 brew install libx264  (optional dependency but recommended for AVI recording)
 		 </pre>
 		 Otherwise you can install the dmg packages available from the Qt and SDL websites. 
 		 <br><br>The following tools are required to build from source: