Hello
(K1, yo) seven times is:
K1, yo, k1, yo, k1, yo, k1, yo, k1, yo, k1 yo, k1, yo
(I do hope I’ve put 7 repeats there!)
The yo does not go into a stitch and it does not use up a stitch. After the k1 your yarn is behind the fabric, you bring the yarn between the needles as though to purl and over the needle to the back. This places a strand of yarnmover the needle. That’s all. When you do the next k1 it secures this strand in place.
To be honest when I do it I bring the yarn between the needles as though to purl and I eave it there until I perform the knit stutch. Performing the knit stitch draw the yarn over the top of the needle anyway, exactly the same but for me I find holding and tensioning easier this way.
So…
*(K1, yo) 7 times is as above
Then k7
Then repeat from *
The last 7 stitches are (yo, k1) seven times.
Does this help?
For video tutorials I suggest just looking at k1, yo or how to yarn over, or we could find you one.