Okay, so I did some research...
The first pair is used for the target position of the squad, which can either be a hook (the hooks position will then be followed) or a Marker, the second pair is the hook or the marker the squad will look at
It is possible to set both the marker and the ref of both pairs through MsgAction actions
Very interesting

Nice, very interesting indeed
so I guess that must have been the few refs in the CKMsgAction
Also kinda weird that you can use markers, because they can't move ingame afaik, but whatever
Maybe that's what the dude used in the Kal editor, when he moved the squad in the video
The markers are used sometimes to make the squad stop following Asterix/Obelix, for example in Rome there are 200 enemies guarding the arena fights which will follow asterix when you approach them, but once you go back to the previous area the squad will go back to its original location, in this case the developers made the squad go to a marker which is right at the initial position of the squad
is it possible to upload custom animation or replace animations in editor?
hope that one day it will be possible
That's definitely a long time off for now
You would need to first understand the format of the game and then try to find a matching one supported by 3d applications, but most likely that one will need to be tampered with so the game can use it
There are actually 5 types of Parameters, the last one is a marker ref (type 4)