Document Blackmagic Design copyright

debian/copyright

@@ -174,6 +174,32 @@ Files: plugins/obs-ffmpeg/obs-ffmpeg-source.c
 Copyright: 2015 John R. Bradley <jrb@turrettech.com>
 License: ISC
 
+Files: plugins/decklink/win/*-sdk/*
+Copyright: 2009,2014 Blackmagic Design
+License: Expat~Blackmagic
+ Permission is hereby granted, free of charge, to any person or organization
+ obtaining a copy of the software and accompanying documentation covered by
+ this license (the "Software") to use, reproduce, display, distribute,
+ execute, and transmit the Software, and to prepare derivative works of the
+ Software, and to permit third-parties to whom the Software is furnished to
+ do so, all subject to the following:
+ .
+ The copyright notices in the Software and this entire statement, including
+ the above license grant, this restriction and the following disclaimer,
+ must be included in all copies of the Software, in whole or in part, and
+ all derivative works of the Software, unless such copies or derivative
+ works are solely in the form of machine-executable object code generated by
+ a source language processor.
+ .
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+ SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+ FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ DEALINGS IN THE SOFTWARE.
+
+
 Files: debian/*
 Copyright:
  2015 Carl Fürstenberg <azatoth@gmail.com>