just look at the piece: you want to twist the yarn around one another so that there is no hole when you change from one to the other.
But I meant: weave in the strands that you carry by twisting the yarns around every 2 stitches.
I do not have time tonight to make a video. Otherways I would.
But look at the link I gave you. She shows how she does it (probably the most elaborate way of all!)
What way do you knit? Yarn in left or right hand? Once we know that we can probably get you better help.
I am working on a 2 color project now after finishing one that had 3 colors in several parts. I am getting better by the day