It can be restarted and ‘picked up’ again while the editor is running (and oculus runtime is in direct mode) I’ve done it a few times to get positional tracking back. You need to restart it in the config and turn it off/on from the rift power button and it should be fine.
Also to do the bit you are unclear about…
in your level blueprint - add the node ‘event begin play’ (type that into the box and it will show) then add another node ‘execute console command’ - join them up and add the text “hmd sp XXX” in the box of the node you just added.
I have a number of these in sequence to put me instantly into full screen (to rift) no messing needed. You won’t need all these and can remove/add whatever you like but should steer you in the right direction!
