The MPEG controls actually support many more codecs than
just MPEG. See :ref:`mpeg-controls`.
-Memory-to-memory devices can often be used as a shared resource: you can
+Memory-to-memory devices function as a shared resource: you can
open the video node multiple times, each application setting up their
own codec properties that are local to the file handle, and each can use
it independently from the others. The driver will arbitrate access to