Best audio and visual for concert films

Thanks. Are you “ripping” them to storage?

Yes, to a NAS, if you want to create a library and a "concert vault" consider getting a Zidoo player that will have storage as well as play everything. This looks like a good choice:

https://summithifiusa.com/products/zidoo-uhd5000

Can you download a blueray quality directly to a NAS?

Skip the blueray?

Let’s ask it another way, where can you great concerts other than blueray. You can stream a lot of great content. The Zidoo has an android OS and you can get geat apps for concert streaming. They won’t have the dynamics of a blueray but thre are tons of content, they add new content all the time, and its cheap:

1) Qello Stingray

2) Plex (has various concert channels that are FREE)

3) Berlin Philharmonic

4) Tidal (streams videos of concerts)

5) Nugs.net

5.1 mixes for authentic concert sound. BluRay best. Just because there are other sources of concerts does not elevate their quality.

I favor 5.1 rips as being "good enough."