What are the similarities and differences of this ancient technique that is used around the world?

What are the similarities and differences of this ancient technique that is used around the world? How would this type of traditional cooking method affect the cultural and social makeup of communities? (recommendation of 100-200 words)

Hawian IMU Video:

1) https://www.youtube.com/watch?v=bjhW077VMno
2) https://www.youtube.com/watch?v=uGRKopdZhvM

Middle Eastern:

1) https://www.youtube.com/watch?v=EhNyNt3LhcI
2) https://www.youtube.com/watch?v=U6zhdIltW0Y
3) https://www.youtube.com/watch?v=qo-1vf51iBg

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