This is how I do a “folded join”, which prevents a twisted picot when joining the last ring to the first ring of a tatted motif.
Whenever all rings are facing outward from the center of a tatted motif, then that’s when a folded join is used. There’s other ways to do this kind of join, but this is what works easiest for me.
The video speed is faster than my actual tatting!
Through the magic of an app on my smartphone, I figured out how to flip the video to show the left-handed version as well!
Here's the left-handed view: