diff --git a/third_party/libwebm/mkvmuxer.hpp b/third_party/libwebm/mkvmuxer.hpp
index 3159bbe..1563ea5 100644
--- a/third_party/libwebm/mkvmuxer.hpp
+++ b/third_party/libwebm/mkvmuxer.hpp
@@ -1,10 +1,14 @@
-// Copyright (c) 2012 The WebM project authors. All Rights Reserved.
 //
-// Use of this source code is governed by a BSD-style license
-// that can be found in the LICENSE file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS.  All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
+// Copyright (c) 2016, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 2 Clause License and
+// the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+// was not distributed with this source code in the LICENSE file, you can
+// obtain it at www.aomedia.org/license/software. If the Alliance for Open
+// Media Patent License 1.0 was not distributed with this source code in the
+// PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+//
+
 
 #ifndef MKVMUXER_HPP
 #define MKVMUXER_HPP
diff --git a/third_party/libwebm/mkvmuxertypes.hpp b/third_party/libwebm/mkvmuxertypes.hpp
index d0fc9fe..8c65ca8 100644
--- a/third_party/libwebm/mkvmuxertypes.hpp
+++ b/third_party/libwebm/mkvmuxertypes.hpp
@@ -1,10 +1,14 @@
-// Copyright (c) 2012 The WebM project authors. All Rights Reserved.
 //
-// Use of this source code is governed by a BSD-style license
-// that can be found in the LICENSE file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS.  All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
+// Copyright (c) 2016, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 2 Clause License and
+// the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+// was not distributed with this source code in the LICENSE file, you can
+// obtain it at www.aomedia.org/license/software. If the Alliance for Open
+// Media Patent License 1.0 was not distributed with this source code in the
+// PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+//
+
 
 #ifndef MKVMUXERTYPES_HPP
 #define MKVMUXERTYPES_HPP
diff --git a/third_party/libwebm/mkvmuxerutil.hpp b/third_party/libwebm/mkvmuxerutil.hpp
index e318576..0791d60 100644
--- a/third_party/libwebm/mkvmuxerutil.hpp
+++ b/third_party/libwebm/mkvmuxerutil.hpp
@@ -1,10 +1,14 @@
-// Copyright (c) 2012 The WebM project authors. All Rights Reserved.
 //
-// Use of this source code is governed by a BSD-style license
-// that can be found in the LICENSE file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS.  All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
+// Copyright (c) 2016, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 2 Clause License and
+// the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+// was not distributed with this source code in the LICENSE file, you can
+// obtain it at www.aomedia.org/license/software. If the Alliance for Open
+// Media Patent License 1.0 was not distributed with this source code in the
+// PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+//
+
 
 #ifndef MKVMUXERUTIL_HPP
 #define MKVMUXERUTIL_HPP
diff --git a/third_party/libwebm/mkvparser.hpp b/third_party/libwebm/mkvparser.hpp
index 75ef69d..2281126 100644
--- a/third_party/libwebm/mkvparser.hpp
+++ b/third_party/libwebm/mkvparser.hpp
@@ -1,10 +1,14 @@
-// Copyright (c) 2012 The WebM project authors. All Rights Reserved.
 //
-// Use of this source code is governed by a BSD-style license
-// that can be found in the LICENSE file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS.  All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
+// Copyright (c) 2016, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 2 Clause License and
+// the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+// was not distributed with this source code in the LICENSE file, you can
+// obtain it at www.aomedia.org/license/software. If the Alliance for Open
+// Media Patent License 1.0 was not distributed with this source code in the
+// PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+//
+
 
 #ifndef MKVPARSER_HPP
 #define MKVPARSER_HPP
diff --git a/third_party/libwebm/mkvreader.hpp b/third_party/libwebm/mkvreader.hpp
index 82ebad5..a4f5850 100644
--- a/third_party/libwebm/mkvreader.hpp
+++ b/third_party/libwebm/mkvreader.hpp
@@ -1,10 +1,14 @@
-// Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 //
-// Use of this source code is governed by a BSD-style license
-// that can be found in the LICENSE file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS.  All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
+// Copyright (c) 2016, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 2 Clause License and
+// the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+// was not distributed with this source code in the LICENSE file, you can
+// obtain it at www.aomedia.org/license/software. If the Alliance for Open
+// Media Patent License 1.0 was not distributed with this source code in the
+// PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+//
+
 
 #ifndef MKVREADER_HPP
 #define MKVREADER_HPP
diff --git a/third_party/libwebm/mkvwriter.hpp b/third_party/libwebm/mkvwriter.hpp
index 684560c..779bb4c 100644
--- a/third_party/libwebm/mkvwriter.hpp
+++ b/third_party/libwebm/mkvwriter.hpp
@@ -1,10 +1,14 @@
-// Copyright (c) 2012 The WebM project authors. All Rights Reserved.
 //
-// Use of this source code is governed by a BSD-style license
-// that can be found in the LICENSE file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS.  All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
+// Copyright (c) 2016, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 2 Clause License and
+// the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+// was not distributed with this source code in the LICENSE file, you can
+// obtain it at www.aomedia.org/license/software. If the Alliance for Open
+// Media Patent License 1.0 was not distributed with this source code in the
+// PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+//
+
 
 #ifndef MKVWRITER_HPP
 #define MKVWRITER_HPP
diff --git a/third_party/libwebm/webmids.hpp b/third_party/libwebm/webmids.hpp
index ad4ab57..cf649c9 100644
--- a/third_party/libwebm/webmids.hpp
+++ b/third_party/libwebm/webmids.hpp
@@ -1,10 +1,14 @@
-// Copyright (c) 2012 The WebM project authors. All Rights Reserved.
 //
-// Use of this source code is governed by a BSD-style license
-// that can be found in the LICENSE file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS.  All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
+// Copyright (c) 2016, Alliance for Open Media. All rights reserved
+//
+// This source code is subject to the terms of the BSD 2 Clause License and
+// the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+// was not distributed with this source code in the LICENSE file, you can
+// obtain it at www.aomedia.org/license/software. If the Alliance for Open
+// Media Patent License 1.0 was not distributed with this source code in the
+// PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+//
+
 
 #ifndef WEBMIDS_HPP
 #define WEBMIDS_HPP