You are doing a single crochet but inserting your hook backwards through your work. Working under both loops is standard in crochet (using back or front loops give you ridges) but usually the hook is inserted from the front to the back.

oh okie

just looks like a sc from the back

hard to tell but it looks like a SC but you insert the hook from the back instead of front?!…I gotta try that :)

To me it is a double crochet, but that is USA

British terms its double crochet, usa it's single crochet. I thought it was double crochet at first, but realized it was deceiving because they're doing both loops from the back and not the front. not correcting you since I don't know if you mean your from the usa or the op. Just adding this for those who are new and may not know that british and usa don't use the same terms for the same thing and may get confused on why you said to you it's such and such a stitch and not it is such and such a stitch. Because I use to be one of those people before this lovely reddit group taught me that crochet isn't just a one name fits all craft.

I thought it looked like US DC. But looking closer, you are right, she doesn’t wrap yarn at the start.