Are you looking for a "how to knit a scarf" video or for one to show how to use two colors of yarn? I'd try either just a google search or go to youtube and search there. Do you already have a pattern you want to use? You could post a link that would help with more specific questions.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper