And, here's how the process should work for you:
Ideas and discussion about the possibilities and what could work --> research --> deciding on a good set of sources --> [script <--> storyboard] --> make the video.
--So: the storyboard you're putting together should be an outline that shows in a visual, linear way how your scripted message is going to move through the video. It IS your script, embodied. If you create a storyboard in sufficient detail -- showing in one box or picture after another what will be on the screen and what will be the audio (with the audio -- your scripted narration or the audio of a video you're using-- in text form on, above, or below the box) -- you should be able to stitch it together without a lot of frustration and delay.
If you're stuck on this, please re-visit the videos about storyboarding and scripting.