I would write a review on the film and post it in the Film Only category. And I would give Dooyoo the Amazon link for the DVD.
Why? It's not a DVD 'package' in the way that the DVD category on Dooyoo implicitly asks for DVD 'package' reviews. The Dooyoo VHS category is NOT a VHS category, it is Film Only category and the VHS name is a bug in the system waiting to be fixed. If you're writing a Film Only review, the film could have been watched in any number of ways - buying, renting, cinema, DVD, VHS - and it therefore doesn't matter which format you give to Dooyoo in the suggestion info.
PS: Of course, the fact that the suggestion box can't be tailored to accommodate individual categories is yet another bug in the system... but we won't hold our breath on that one. Most annoying when looking for [unnecessary] images in some categories.