Bit of a slower video but I hope it will help anyone looking at a ducted minisplit unit. We chose these because we didn't want the units to be hanging off the wall. This option allows the unit to be placed in an attic space and then ducted to each location meaning all you see is a typical register. Only found a couple of issues in the design but feel it'll all work out ok.

Here I unbox one of the Olympus MultiUnit Recessed Duct MiniSplit units and then adjust the return air from the back of the unit to the bottom. I also build a simply Plenum out of duct board and some takeoff boots for 4" flex duct. We have four of these units going into our OffGrid Barndominium home.