Filming solo and on a hobo budget, as we [me] have done consistently since TVShow 1X01, comes with a cadre of issues one must compensate for.
Setting aside staging techniques for auto-exposure and focus, having real time perspective of framing the shot w/o a monitor can end up sending quality performances to the rubbish bin.
Ingredients 92mm x 50mm mirror (dollar store) 1/4-20 Bolt (camera mount) M4 screws and nuts