other yarn string coming off the left needle in video?

What is it for, where did it come from, i don't have it?

bekathwia2 months ago

It's the tail leftover from a long tail cast on. If you cast on with a different method, your tail might be on the other end of the knitting. You can learn the long tail cast on in this lesson: https://www.instructables.com/lesson/First-Scarf-C...