How do I get a digital copy of a movie onto a Nook Tablet?

I have two movies (both blu-ray) that have digital copies, (The Dark Knight and Harry Potter) and I know that I can put them on my Nook tablet, but I'm just not sure how. I tried looking online, but couldn't find anything that could help. I really want to watch these on there, does anyone know how I could put the digital copy onto my Nook? Thanks in advance.

Report as