Help with a pattern

I am working on a pattern for a top that has a row I can’t figure if Im doing it right. It states…
K1, * yo, p2tog* repeat from * until end of row
How can I continue to yo when my yarn is already in front ready to purl? I tried to yo to the back and purl the 2 tog, with my yarn in back, but it doesnt look right.

Very Pink Knits has a video showing you