Bev's Country Cottage is my go-to place for things like this. Here's a link to her loom knitting page:
http://www.bevscountrycottage.com/how-to-loom-knit.html Note that there are a couple of links to videos on that page. If you go farther down, she has pictures. Even
farther down the page are some patterns. She has links to other sites as well. I love Bev's stuff (all crafts); her patterns are very clear & simple.