I have used a technique where I will remove the barrier for some time, under my direct observation and re introduce the barrier if there is trouble. Replace the barrier when you are no longer able to directly observe, until you are comfortable with their interactions when your watching. They even talk about using incrementally longer periods without a barrier in the Male to Female change paper.
Edit to add the link
I don't see the positive pairing signs I look for in that small clip, but I also don't see any major red flags. That being said its only a 5s clip you will have a better gut feel about it. I would recommend adding like 10x the amount of cover than is pictured, idk if you took some out for the vid. Often I would have issues if there wasn't enough cover for the angels to feel like they have their own spaces. sometimes this was accomplished with a large 125 with only a few seperated structures, or in smaller QT tanks I had better luck packing them with pvc and fake plants. A good tip I heard is the fish should be spending more time thinking about where they are going, not the other fish that's in their open area.