Not my video, but fell in love with this in half a second. THIS is my monitoring tool of choice effectively immediately.
It monitors your entire ProxMox cluster in a very clean, very USEFUL, very intelligent way. In my setup, I logged onto my Proxmox4 system, ran the curl statement to add the system, and poof, all three machines went in. Nutty simple.
ProxMox itself is fuzzy with showing details on what your VMs have for storage, the drive information only shows (In my opinion) inaccurate details about drive utilization, doesn't give you details about network traffic in use, how much memory each VM is showing, etc. "Pulse" fed me that missing information next to instantaneously about ALL my virtyual machines (All 35 VMs across all three of my hosts)
I haven't set it up yet, but according to the video you can broadcast problems to services like Discord and others that I don't use.
[Edit: Playing with the UI settings, this is so purdy]