# shape + unique values
print("shape:", df.shape)
print("n unique rows:", df.n_unique())
for j in range(df.shape[1]):
    print("n unique elements (" + df.columns[j] + "):", df[:,j].n_unique())

### output
# shape: (84, 4)
# n unique rows: 84
# n unique elements (video_id): 84
# n unique elements (datetime): 84
# n unique elements (title): 84
# n unique elements (transcript): 82