You are exactly right for most of the effects they are downloaded from ESA/Hubble. I downloaded all of the videos then recut the best ones to match the music and dialog etc and of course added the pans and zooms of still images. Mainly it was as I said an excercise in editing video and music and timing. And it was all something new to me as my background is in illustration and fine art.
I would like to do another one in HD and all from scratch in 3DS Max with pro voice over etc. But I have to get the time and budget for it before I will be able to. But some day
Also thanks for all the feedback from every one. It is interesting getting to hear what people like and dislike etc.