Base resource for video streams.
Base resource type for all video streams. Classes that derive from [VideoStream] can all be used as resource types to play back videos in [VideoStreamPlayer].
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Called when the video starts playing, to initialize and return a subclass of [VideoStreamPlayback].
- The video file path or URI that this [VideoStream] resource handles. For [VideoStreamTheora], this filename should be an Ogg Theora video file with the [code].ogv[/code] extension.