Now my wife and I have put the shelving together, it is OK. I think you need to do more on the erection instructions, it is all very well providing a video to assist but some of us oldies like the constructions to be in front of us on paper ( If Ikea can do it I am sure you can!).
In my opinion the instructions you do provide are incorrect anyway. Narrow and wide edges of the shelving bars should be the other way round from what is stated Dave Jenkins