I promise, this is the trickiest part. After this it's easy peasy.
The second time you are instructed to “Knit 1 Long” you are asked to "insert the right-hand needle into the same space as before".
This space is a bit awkward to access because you're kind of going 'backwards'.
I suggest moving your right-hand needle ever-so-slightly backwards (ie. to the right), while pointing it downwards, at the target space.
To make the space easier to access, try stretching the fabric a bit with your left hand, while using your right index finger to hold back the stitches on your right-hand needle so they don't fall off. That's what my left hand and right index finger are doing in (6).
steps 7 & 8
Now that your needle is through the space:
(7) Knit a stitch--just like normal, by wrapping your working yarn counter-clockwise around your right-hand needle, then............
(8) draw up a loop onto your right-hand needle.
This step can look a bit messy, but it's exactly the same motion as the first time..there are just more stitches in play now.