asset = GES.UriClipAsset.request_sync(video_uri)
clip = layer.add_asset(asset, 0, 0, asset.get_duration(), GES.TrackType.UNKNOWN)
asset = GES.UriClipAsset.request_sync(video_uri)
clip = layer.add_asset(asset, 0, 0, asset.get_duration(), GES.TrackType.UNKNOWN)