Knitting with two different colors

I wanted to make a scarf and I wanted to use two different colors, but the video was confusing. I’m left handed so I guess I’m using the German Method. Anyway, Can’t I just take both of the colors and do the knit stitch or will my scarf come out looking odd?

How you do it depends on what you want to do. We need more information.

Do you want to knit the colors together as one strand, or separately in stripes?