

A remux is a fully lossless video file, typically a MKV, that is just the video streams from a DVD/Bluray wrapped in an MKV container. It’s not a new encoding, it’s the original video, in its original codec, fully lossless.
I personally like knowing that I’m watching the best possible quality of any given media, without any extra processing. Most people probably wouldn’t immediately notice the difference between a high quality encode and a remux, but I’m a quality snob.
Yeah, that’s a clearer way of saying it. I usually think of the highest quality commercially available version as being lossless, since the raw files or negatives are almost never accessible to the public (wouldn’t that be awesome??). But yeah, every DVD/Bluray is still technically just a disc with lossy video files that the studio encoded.