Green Deduction: ebiggie's debut is a beautiful & smooth puzzle to savour

Today's Video:

A well named puzzle from ebiggie that certainly hints at the approach to solve this beauty. Enjoy!

Link to Play:

Green Deduction by ebiggie https://link.sudoku-sleuth.com/GreenDeduction

Rules:

Normal Sudoku rules apply. Place the digits 1 through 9 in each row, column, and box.

GERMAN WHISPER (GREEN): Adjacent digits along a green German Whispers line must differ by at least 5. Digits may repeat if other rules allow.

KILLER CAGE: The sum of the cells in a cage must equal the total given for that cage. Digits in a cage do not repeat.