Welcome to KH!
Always include a link to the pattern when you can. It makes it easier to help if we can visualize.
You'll find a video tutorial here on Knitting Help at the video tab at the top of the page and then under tips. Scroll down a bit.
The last bit with the k2tog and YO is the button holes. If you don't know how to k2tog (knit two together - this is a decrease) or YO (yarn over - this is an increase) there are also videos for those under increases and decreases. Watching those would probably make more sense than written instructions. If you still don't understand then come back to this thread and we'll try to help more.