To be honest, I'm not sure. You might want to check major online retailers like Amazon or eBay, or local DVD stores. Sometimes new releases take a while to come out on DVD, so it's worth keeping an eye out.
American fiction is sometimes on DVD. Big blockbusters and classic series often are, but indie or niche works might not be. It's best to look on major shopping websites or at dedicated DVD stores to see what's available.
It's difficult to say. Uniqueness in a story can be subjective. What one person finds unique, another might not. The 'Tooth and Nail' DVD might have elements that are very different from other stories, like a unique setting or a set of characters that we haven't seen before. Or it could be a blend of familiar elements in a new way. But until we actually watch it or get more details about it, we can't really determine if it's a unique story.
It's hard to say for sure. Release dates can change depending on various factors like production and distribution. Maybe check with your local DVD store or online retailers periodically.