Under stills, you need a simple remote button that you can take one still at high resolution.
Under the viewer, you need a pause button that halts playback and keeps the image displayed, not going blank like it does now.
You need to be be able on the viewer to zoom and pan a single still or pause playback.
Except for zoom and high res still, the functionality is buried in their, it is just that the operator interface is so clumsy and poorly thought out, you cant access this stuff, nor understand how to do so. You need an industrial ergonomist GUI designer. This poor operator interface on top of great underlying technical work is very much in the stereotype of German product design. A brilliant engineering culture in search of human factors design.