fn load_episode_video(
dataset: &LeRobotDataset,
observation: &str,
episode: EpisodeIndex,
timeline: &Timeline,
time_column: TimeColumn,
) -> Result<impl ExactSizeIterator<Item = Chunk>, DataLoaderError>
fn load_episode_video(
dataset: &LeRobotDataset,
observation: &str,
episode: EpisodeIndex,
timeline: &Timeline,
time_column: TimeColumn,
) -> Result<impl ExactSizeIterator<Item = Chunk>, DataLoaderError>