Mitten pattern question

my pattern has the following instruction…
P1, (inc 1 in next st) 2 times, P1

  • not sure how to do this type of increase?

here is the full pattern:


When it says ‘in next stitch’, I would take that to mean knit into the front and back of the stitch. If you don’t know how to do that, here is a video under
k1 f&b aka kfb:

thanks for your help