Sudoku By Example Season 1, Episode 2 - Challenge Puzzle for September 13, 2021

Season 1, Episode 2 of Sudoku by Example Challenge Puzzles. This is the challenge puzzle for September 13, 2021. This video is aimed at those relatively new to Sudoku and is intended to improve your ability to quickly spot patterns in Sudoku puzzles.

The Sudoku game that I am playing is called TheSudoku.com (there are similarly named others, so make sure it's this one by Kraisoft) on the Google Play Store. It is apparently available for Apple phones, and I assume the challenge puzzles are the same. Note that it might look different if you are playing on a phone as I am playing on a tablet, but the gameplay should be the same or very similar.

Please provide feedback in the comments on the style of these videos, suggestions, or confusion as to how I applied a rule within the puzzle.