Help identifying this stitch please!

[Hereforthesteak]

I was doing a random Google search of patterns and saw this one. In the title of the video it linked to it said it was the Tunisian stitch. But in the video the outcome looks different. This almost looks like knitting to me, but my grandmother says she has a pot holder from a long time ago that looks like this and she thought it was a tight double crochet.

If someone could help me identify this stitch I would appreciate it.

Thank you!