The videos we watched:
https://www.youtube.com/watch?v=oBxosZ6Hd7Y
https://www.youtube.com/watch?v=s_fcTrZUvLo&list=PL4ziQDgKv4EpM_WbXSFRwFFd5n9yVTsO0&index=12
https://www.youtube.com/watch?v=4_AeKsEj9VM&list=PLm_cnYSOWBw3pkj6zMjkgGhFCDlqm6nCD&index=13
https://www.youtube.com/watch?v=oNT4hJ4m1nY&list=PL4ziQDgKv4EpM_WbXSFRwFFd5n9yVTsO0&index=15
https://www.youtube.com/watch?v=JIKGW5KUfHw&list=PLm_cnYSOWBw3pkj6zMjkgGhFCDlqm6nCD&index=5
https://www.youtube.com/watch?v=oBxosZ6Hd7Y
https://www.youtube.com/watch?v=s_fcTrZUvLo
https://www.youtube.com/watch?v=4_AeKsEj9VM
https://www.youtube.com/watch?v=GVrWCSJGqGc
https://www.youtube.com/watch?v=oNT4hJ4m1nY
