Cloning effect- Notes

So guys, I've mentioned a few times that Me and Connor want to create the cloning effect within our music video, so before we went straight into it, we wanted to have a practice at this. I've researched a lot into this effect, and couldn't find a helpful video, however, two media students (Dan and Alex) recently used the cloning effect within their preliminary (I'll link this down below), so I decided to ask their advice. Dan recently showed me what steps to take in a simplified form, and it doesn't seem as hard as it looks. Here are the notes I made whilst Dan taught me the steps, beware, they are in note form, so I apologise if you struggle to read these.

Here is Dan and Alex's preliminary where they used the cloning effect.