i used a basic wooden frame and a 24 inch monitor.
i used this monitor, because its very flat and had the perfect size for the 60x40cm glass:
i did not remove any plastic from the monitor, so i can reuse the monitor if i want.
it has 3% opacity. For me it was important, that you can’t see the monitor that well (gray background light), so this one was a perfect choice. Maybe in an open room with sunlight you need more opacity.
What i may do
Silicon gap between mirror and wooden frame
Add motion sensor for energy saving purpose
Build some modules for smart home
Back of the mirror
For the front border i just used a wooden strip from my local shop