No problem Tay/Tycho.
I suspect you might be looking at the UK Amazon site (which the dvd release is not listed on.) It's Amazon in the US you need to access.
Just do the following:
Type in www.amazon.com (not www.amazon.co.uk)
In the search box in the centre at the top type: i remember nelson
It should pop up as the first of the selections recommended.
I'm assuming that the dvd is only available from amazon.com and not the UK based service, but that isn't a problem. I've ordered many items available there and not here, and always experienced good, fast service.
Just make sure that when selecting the type of shipping required, go for expedited and pay a little extra if possible, or the wait for delivery can be up to 6 weeks.
It's worth noting that numerous Nelson related books/dvds etc., are available from amazon.com in the US but not at amazon.co.uk in the UK and vice versa.
Including amazon.com when searching for specific or rare books can sometimes turn up a nice surprise.