It's a challenge to create something. You have it all planned out in your head, but just then, while you are 1/2 through it you realize that something doesn't make sense. When composing a production, remember that the audience's attention span is always much shorter than the directors. If you're planning on making a Promo, I would suggest sticking to 45 seconds - 1 minute. I remember a while back I released a first episode of a production that I was working on. All went well, got 2K views and it held there. This episode was 30 min long. Only first 10 were being watched. I decided to do a test, so I did a small snippet of extra footage I had, and views skyrocketed. I'm not meaning to boast, but my point is to always look at analytics. If you'd like to know what I'm talking about above, just visit D.F.S. TV on Youtube, and look at Trucking Thru America; Extras : Reversing a Big Rig. Hope I helped you out!