Scott Strosahl has made a number of appearances on Cracking The Cryptic and is also a solver (mainly word puzzles) on his own youTube channel. His first feature on CTC is Killer Code which is a killer code with totals that have been coded. His showcase video provides an insight into how he sets puzzles and can be viewed by clicking the play button in the centre of the video above.
Selecting a sudoku title will allow you to play it, selecting Simon or Mark image next to the title will allow you to watch it.