ostsjoe
Try booting something different on proxmox like an ubuntu live desktop, just to make sure networking is working there. Seems like haos can’t talk to the Internet.
Probably just over zealous ddos protection. It’s often a balance of a few false positives in order to keep the site online.
If a controller is still connected (Bluetooth?) it may be a controller order issue, you can try reordering them.
No, the browser would still send YouTube.com as the host header. While yewtu.be could be configured to allow this to work, the TLS cert would not and the browser would get upset.
Jellyfin is very conveniently packaged in docker, so while it may seem daunting, I highly recommend at least trying that route.
Running an nfs mount, docker or not, should be perfectly fine. Jellyfin just uses normal storage so won’t care if it’s nfs. No real special considerations with proxmox either, especially without worrying about a dedicated GPU. Just spin up a Debian guest and go.
Fortunately that’s not how it works when you have all the access points controlled centrally, like with unifi. Yes there is limited frequency space, but this is much less of an issue on 5ghz. There will also only be one ssid, and handoff between access points is pretty seamless.
3-4 is probably overkill, but the attenuation situation sounded pretty dire. I run two in my house for redundancy mostly, just standard American stud and drywall construction.