How to create a compiled video from multiple snippets put in a certain order?

Hello everyone,

I'm trying to compile three pieces of videos together. The final goal is to play the three video clips one after the other according to the order on a placed extras on chronological fzology.

Example:
On a piece of video: A B C
On the spot the pieces A, C and B in this order.
When the 3 pieces are placed, the videos A, C, and B must be played one after another in one go.

Thank you for helping!