> A MacBook and a external Hard Drive is all I would need, correct?
Yes. Download VLC, a free video player, to watch the mkv version. Make sure you pick the mono or stereo soundtracks unless you have a surround sound setup for your MacBook (the 2nd and 3rd tracks from the Audio menu's Audio Tracks submenu).
Watching on an iPad or Apple TV gets more complicated since the video needs to be converted.