Nothing Fishy Here...

Here is what the backside looks like. OP notes this takes more fabric than paper piecing, but that excess fabric makes it already triple-layered. Besides not needing backing fabric, I don't think you'd need batting for this quilt at all. It's already thick and soft just from folding all that fabric into a hexagon.

Each hexagon begins as a 6" circle. camelscrafts does this by creating a paper template using a compass. According to the video, a 6" circle will create a hexagon that is 2.5 inches tall.

These hexagons are hand-sewn. Thread the needle.

With the fabric right side facing, find the center of the circle by folding it in half right sides together, then folding it in half again (wrong sides are facing). The top of the triangle shape is the center of the fabric circle.

Make a small stitch into the center of the fabric. The wrong side is still facing.

Unfold the circle. There will be a small stitch in the center.

Now the hexagon is created by folding the circle into itself: Take the needle to one of the edges of the fabric (it doesn't matter which one). Pull the needle through and pull the thread tight. This will fold down the fabric and create an edge of the hexagon. Crease the fold with your finger.

This fold has two corners, one at the top and one at the bottom. Put the needle into one of the corners and pull the thread taut. This will create another fold.

Continue this going around the circle until all of it is folded down, creating the hexagon. camelscrafts notes that the last corner pulled in may be a little bit "wonky" (no precise point in the corner) if the corners were not done precisely. However, that corner is pulled into the back, so is not visible from the front.

The hexagon is now formed. Sew around the folds in the middle of the circle to hold the folds in place. Tie off and cut the thread.