[VideoStream] resource for Ogg Theora videos. [VideoStream] resource handling the [url=https://www.theora.org/]Ogg Theora[/url] video format with [code].ogv[/code] extension. Returns the Ogg Theora video file handled by this [VideoStreamTheora]. Sets the Ogg Theora video file that this [VideoStreamTheora] resource handles. The [code]file[/code] name should have the [code].o[/code] extension.