Let's face it, threading an overlocker or serger isn't the most fun you could be having while sat at your sewing table.
The good news is that it's actually quite rare that you'd need to thread it from scratch.
More often than not, you can get away with this easy, speedy method of changing the threads that I'm going to show you - a method which doesn't require you to navigate all those hooks and loopers. Hooray!
You'll need to do this while the machine is already threaded up, before any of the cones run out of thread - so keep a beady eye on those cones. It's the perfect way of rethreading if you just want to change the colour, for example.