I already watched a couple of videos on sales order and I created a couple of sales orders too. But the information that you have provided is so much helpful which I never come across. I would definitely recommend the video to others.
We have a Beginner's Guide to NetSuite Development playlist, and you can watch the first video here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-A88--7ScUNQ.html This series does walk through SuiteScript 2.0 rather than 1.0, however. Hopefully it can still be useful to you!