The Jag usually has the left side of the tank and the RD has the right side.The RD still goes in the Jags terratorry when it's feeding time but the Jag will go in the RD's ground when he feels like it.He is just to solid to argue with.The other fish aren't really seen as a threat to the Jag and RD and pretty much just hang out.
The flaring you see in the vid is probably as bad as it gets.No one ever bites or lip locks.The Jag is peace keeper of sorts.If anything does happen,he is straight on the scene and that is enough to keep everything in check.
Glad you liked the vid.