I think it's important to consider whether you have friends who will be streaming video content from your NAS over the internet. If so, you have no control over what equipment they will be using to watch your videos. So, it may end up being equipment that is not natively compatible with your video formats, and may require transcoding. You could take the view that "that's their problem," but they will be complaining to you. Or, you could get the + series NAS and have less such problems.
Also, the + series runs Docker and the others don't. It would be a shame to miss out on all the Docker fun. It HUGELY expands the variety of things your NAS can do.
Also, the + series runs Docker and the others don't. It would be a shame to miss out on all the Docker fun. It HUGELY expands the variety of things your NAS can do.