There are multiple versions for a whole load of the promo's as they were sold to different programmes both in the UK and US who wanted exclusives and so more cash would be made. I think there are 3 for Rain (2 b&w, 1 colour) and 4 for Paperback Writer (2 b&w, 2 colour) all unique in some way, there are 2 for Help and so on. Most have been bootlegged in excellent quality.
Here is a link to Unsurpassed Promo Videos which a 4 dvd set to give an idea whats out there (some of the clips will be from the ...
