chromium/third_party/widevine/LICENSE

Google LLC and its affiliates ("Google") own all legal right, title and
interest in and to the content decryption module software ("Software") and
related documentation, including any intellectual property rights in the
Software. You may not use, modify, sell, or otherwise distribute the Software
without a separate license agreement with Google.  The Software is not open
source software.

If you are interested in licensing the Software, please contact www.widevine.com