I know about KVM IP extenders but that’s not what I’m looking for. Proxmox captures the output of any VM and LXC and lets you view them in a web browser. Likewise I’d like to digitize the HDMI output from the Proxmox server box and make it viewable in a browser or app on any device on the LAN.
Does such a thing exist?
If you just want video then HDMI capture card like the other replies.
If you wanted HDMI output and also input keyboard/mouse, another PC with a USB Crashcart device or PiKVM