I have made a 7 part series of tutorial videos for YouTube on how to speedrun Jet Set Willy. Here are links to the individual videos:

PART 1: Intro, Bathroom, Chapel, Main Stairway

PART 2: Kitchens, Nightmare Room, Banyan Tree, Conservatory Roof

PART 3: Orangery, West Wing, Cold Store, Yacht

PART 4: Wine Cellar, Forgotten Abbey, Tree Root, Under The Drive

PART 5: Off Licence, MegaTree, Front Door

PART 6: East Wall, Dr Jones, Roof, Ballroom West, Master Bedroom

PART 7: Max Lives and Warpless routes

And here is the whole lot as a YouTube playlist: https://youtube.com/playlist?list=PLqNObzuH834dePmD1qt7cY82QilYsF66e