Duality by Skunkworks: Solution Videos 10 - 14!

The Skunkworks collective has not only supplied the fantastic pack of Duality puzzles, they have also sent us videos explaining the solutions! Here are puzzles 10 to 14, with explanations by the individual constructors. Many thanks from Simon & Mark to all the people involved:

Duality 10: Clogged Arteries by grkles

Normal sudoku rules apply. Each clue outside the grid is both a sandwich clue and a little killer clue.
Sandwich: Clues outside the grid give the sum of the digits between the 1 and the 9 (exclusive) in their row or column.
Little Killer: Clues outside the grid give the sum of the digits along the indicated diagonals. Digits along these diagonals may repeat (if allowed by other rules).

Duality 10 video: https://youtu.be/KZNnfxxklNc 

Duality 11: Viewpoint by Sotek

Normal sudoku rules apply.
All lines are both Renban and Region Sum Lines.
Digits on a Renban cannot repeat and must form a set of consecutive digits in any order.
Digits on a Region Sum Line must have an equal sum within each box the line passes through.

Duality 11 video: https://youtu.be/BbByUMo1YfI 

Duality 12: Slopes by Xenonetix

Normal sudoku rules apply.
Arrows indicate both X-Lockout Lines & X-German Whisper Lines, where the first seen digit in the respective column or diagonal is the length of a straight line matching both of these constraints (of length 2 or more), starting at that digit.
Lockout Lines have diamonds at each end which differ by at least 4, and digits along the lines in between (if any) fall outside of the diamond digit range.
Adjacent digits along German Whispers differ by at least 5.
Duality 12 video: https://youtu.be/aQH3CdS2NMM

Duality 13: Dual Strike by Alaric Taqi A (Crusader175)

Normal sudoku, fortress (maximum) and clone rules apply.

Duality 13 video: https://youtu.be/ySxrkG2b5XI 

Duality 14: Empire State of Mind by Tallcat

Normal sudoku rules apply. A clue outside the grid is both a Numbered Rooms clue and a Skyscraper clue.

Duality 14 video: https://youtu.be/DviFfZ9xcdk