Both of us used an iPhone app that Ruston found to do time-lapse photography. It's called Lapse It and I have to say, it was pretty easy to set everything up how I wanted and export the results.
And all these video skills are a new addition too! Before 2 weeks ago, I only had some basic skills to trim and join a few videos, maybe some text overlays and masking, but nothing that exciting. This was new territory for me. Thankfully I found a free video editing program called DaVinci Resolve 16 that had more than enough features to do the job. I was amazed that it's free!
In the end, our two videos were aligned enough that I only needed to twist mine and do a little zooming to get the edges close enough.
The end result was better than I could have hoped! Year number 6 for us is in the books!