I’m surprised to hear you say that because you asked had me a very similar question and I replied here:
The link I provided you to the Add-Ons repository includes Plex Media server and many others including motionEye (CCTV and NVR).
If you do not find the Add-On you want, but it exists somewhere as a Docker container, you are able to install the Portainer Add-On and then use it to install the desired Docker container. So you have all the flexibility you desire without the complexity of using a VM or the uncertainty of using the ‘Supervised/generic linux’ version.
I had also recommended you use Home Assistant’s Intel NUC image because you already have an Intel NUC and this is an officially supported installation (and likely to remain that way). You have everything you need to produce a supported, flexible installation.