Trying five different OC challenges (Part two)

Links: 1. https://www.youtube.com/watch?v=4_M-pR1P3Ho 2. https://www.youtube.com/watch?v=cOcnzYIV61E 3. https://www.youtube.com/watch?v=iifWr9i8diY 4. https://www.youtube.com/watch?v=EEMNxvMNvV4 5. https://www.youtube.com/watch?v=4VIuJMAzH_U