diff --git a/README.md b/README.md
index ecf4ab31..818aa875 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ obtain the various submodules that go into building Proton:
 
         cd proton
         #for linux:
-        git submodule update --init wine dxvk
+        git submodule update --init wine dxvk ffmpeg
         #for macos:
         git submodule update --init
 
diff --git a/dist.LICENSE.lin b/dist.LICENSE.lin
index 2aa793d7..aa51cfb6 100644
--- a/dist.LICENSE.lin
+++ b/dist.LICENSE.lin
@@ -59,3 +59,11 @@ Parts of this software are based on the OpenVR SDK, which is
 Visit OpenVR at
 
     https://github.com/ValveSoftware/openvr/
+
+---- ---- ---- ----
+
+This software contains FFmpeg licensed under the LGPL 2.1.
+
+Visit FFmpeg at
+
+    https://ffmpeg.org/
diff --git a/dist.LICENSE.osx b/dist.LICENSE.osx
index c0f97ff9..8283d194 100644
--- a/dist.LICENSE.osx
+++ b/dist.LICENSE.osx
@@ -88,3 +88,11 @@ Parts of this software are based on the OpenVR SDK, which is
 Visit OpenVR at
 
     https://github.com/ValveSoftware/openvr/
+
+---- ---- ---- ----
+
+This software contains FFmpeg licensed under the LGPL 2.1.
+
+Visit FFmpeg at
+
+    https://ffmpeg.org/