best youtube videos to watch this week

• https://www.youtube.com/watch?v=1T-KwLkKvJE
• https://www.youtube.com/watch?v=5_e7EhTJQLU
• https://www.youtube.com/watch?v=t_GgSC5ufwc
• https://www.youtube.com/watch?v=g7Rfdovx1mo