Happy New Year. How do I purl a yfwd from the previous row

The pattern says all alternate rows to purl but I’m not sure how to purl a yfwd from previous row. Can anyone help

Purl a yfwd or yarn over the same way that you would purl a stitch on the left hand needle. Insert the right hand needle into the yarn over from right to left and purl as usual.
This video isn’t very close up but it may help.