Hi, welcome! This site has some great videos. Try this link http://www.knittinghelp.com/videos/advanced-techniques and scroll down, the magic loop video is there. If you look at the top of the page and try the "Free Videos" tab you might find others that interest you too.
I definitely recommend a video. I tried quite a few times to get ML from pictures and descriptions but never could. Then ArtLady from on here showed me how in person and I had it in a couple of minutes.