First NAS, possible multi use

[ed]

Technically DS920+ could do it all. If you do have some 4k videos that you want to share remotely then NUC PC might transcode them better. But otherwise, for local streaming (and offline transcoding) Synology NAS could cope with it all. You can also link any ONVIF or FTP based network cameras and use built-in apps.
Also backing up photos and videos with Drive app will be fairly easy.


I hope this helps.