Rookie beekeeper; wild swarm moved into abandoned top bar hive

A few years ago, I tried to save a colony fallen from a tree into a top-bar box and was unfortunately unsuccessful. I have since moved, and the box was unceremoniously dumped in a field on my dad's property in the country. Well, a few days ago I received message from him that a swarm moved in all on their own!
In this video, I flipped the hive upright and put it up on cinder blocks. I also opened it up and got the bars arranged that had fallen in the bottom. I am NOT an experienced beekeeper; constructive criticism is welcome.