I don't think there are any real spoilers here, certainly nothing beyond what you'd see in a trailer or from reading the DVD case.
#5 - East/West
#6 - A Little Princess
I rented this film because it was directed by Alfonse Cuaron (apologies if I've misspelled his name), who has directed the upcoming Harry Potter film. So, I was watching it with an eye to seeing how I thought his style might translate into the PoA film. I have also seen "Y Tu Mama Tambien," and wasn't particularly impressed, so I wanted to see something else by him.
I enjoyed, but did not fall madly in love with, this film. It's a familiar story (for me most familiar in the film version with Shirley Temple), and this version was well done. It was very pretty (visually), and for the most part I thought it was well-acted. There were a few places where I found the childrens' performances to be a bit over-the-top (which is something that has also bothered me with previous HP films, most notably Draco in CoS), but for the most part, I really enjoyed this film. I did cry in a few places (which is a good thing) ::grin::.
#7 - Discovering the Real World of Harry Potter
I checked this out of my local library; it's a documentary which discusses some of the things in the Harry Potter books in terms of their real-life counterparts, or the mythology behind things Rowling used in the books. It was mildly interesting to me as a Harry Potter fan, but not something I'd necessarily recommend. There is a very short interview with JKR, and also appearances by authors including David Colbert. I didn't really like the style of the film, though - it spent a lot of time on goofy photography and camera angles, like one of those unsolved ghost story type shows, trying to set a "mood" and create tension - I'd rather they just present the information, personally. And much of the material seemed to me to be only very loosely connected to anything in the HP books - like the legend that Queen Bodacea (sp?) is buried under King's Cross Station in London. So, I would recommend this to only the most dedicated of Potter fans; otherwise, it's really not that interesting. I had to watch it twice, actually, as I fell asleep the first time through. ::grin::