def METHOD_NAME(centered_pair_vid, small_robot_mp4_vid):
    stack = ItemStack()
    videos = [centered_pair_vid, small_robot_mp4_vid]
    stack.make_sample_group(videos, samples_per_video=3, sample_method="stride")
    stack.get_all_items_from_group()
    # Make sure that we got the right frame items
    assert len(stack.items) == 6
    assert stack.items[0].frame_idx == 0
    assert stack.items[1].frame_idx == centered_pair_vid.frames // 3
    assert stack.items[3].frame_idx == 0
    assert stack.items[4].frame_idx == small_robot_mp4_vid.frames // 3
    stack.get_raw_images(scale=0.1)
    # Make sure an item owns its row of data
    assert stack.get_item_data_idxs(stack.items[1]) == (1,)
    assert stack.get_item_by_data_row(3) == stack.items[3]
    # Make sure that we loaded correctly sized data
    i = len(stack.items)
    h = max(centered_pair_vid.height // 10, small_robot_mp4_vid.height // 10)
    w = max(centered_pair_vid.width // 10, small_robot_mp4_vid.width // 10)
    c = max(centered_pair_vid.channels, small_robot_mp4_vid.channels)
    assert stack.data.shape == (i, h, w, c)
    assert stack.get_item_data(stack.items[1]).shape == (1, h, w, c)
    stack.flatten()
    # Make sure that data was correctly flattened
    assert stack.data.shape == (i, h * w * c)
    stack.pca(n_components=3)
    # Make sure that we have right number of dimensions after pca
    assert stack.data.shape == (i, 3)
    stack.kmeans(n_clusters=2)
    # Make sure we have right number of groups after kmeans
    assert len(stack.current_groupset.group_data.keys()) == 2
    stack.sample_groups(samples_per_group=1)
    for group, item_list in stack.current_groupset.groups:
        assert len(item_list) == 1
    stack.get_all_items_from_group()
    # Make sure we got 1 item from each of the 2 groups
    assert len(stack.items) == 2
    frame_items = stack.to_suggestion_frames(group_offset=10)
    assert frame_items[0].frame_idx == stack.items[0].frame_idx
    assert frame_items[0].group == 10
    assert frame_items[1].frame_idx == stack.items[1].frame_idx
    assert frame_items[1].group == 11