Module representing the Chime SelectedVideoStreams data type
See https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_media-pipelines-chime_SelectedVideoStreams.html
@type t() :: %ExAws.Chime.MediaPipelines.SelectedVideoStreams{ attendee_ids: [String.t()] | nil, external_user_ids: [String.t()] | nil }