https://www.youtube.com/playlist?list=PLRiWQwRPgJl0d5S8awFdwnf5rrDIxFAqV

This video playlist should include everything you need to get started with the Any% speedrun of Trine 3. I would definitely recommend watching the setup and tricks video before going into the individual levels. It contains brief examples and explanations of each trick used in the run whereas the individual levels do not. Let me know if there's anything else I should include in this guide.