Represents the "RichMediaContent" entry of the richmedia annotation object.

It is a required entry defined as part of the PDF 1.7 Extension Level 3 specification.

It contains a RichMediaContentElement.

For definitive details see:.

Adobe Supplement to the ISO 32000, BaseVersion: 1.7, ExtensionLevel: 3; Table: 9.49, page 77.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 333, page 696.

The content dictionary holds the media assets, configurations, and views. It is the main container for all the data the media player needs to render and control the embedded media.