Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Be aware of Regional viewing issues!

I purchased this DVD from a private seller to view as a requirement for a graduate level class and when I tried to watch it, an error code popped up telling me that I did not have authority to view it in my "Region." Upon researching this error, I learned that all DVD players and DVDs are coded by Region, and DVDs cannot be viewed in different regions; for instance, the USA, Canada and Bermuda are Region 1, and Region 2 includes parts of Europe, Egypt, Japan, South Africa, Swaziland, Greeland, etc. The DVD that I bought, purchased here in the US, is only authorized for viewing in Region 2. I have learned my lesson, and write this review to alert others to be aware of something that I had no idea even existed.