From Jimmy Bean: How To Do Yarn Overs Four Different Ways. Did you know that there are many ways to do a yarn over (YO)? We didn&#x27;t either, until Terry shared her knowledge of YOs with us. In this instructional video, she shares it with you as well! Find out the various ways to knit a YO depending on whether you are knitting or purling - and the next time you need to YO, you&#x27;ll be an expert!