The slideshow is just the VÍTÁME VÁS / NA SHLEDANOU welcome/goodbye message (based on whether the panel is entry-/exit-facing, a URL, and wayfinding info such as "🠜 PŘEPÁŽKY 36, 38-44 / 🠝 RECEPCE, PŘEPÁŽKY 12, 13, 15-20, 28-29" . They absolutely could have used a way less powerful machine for this, or better utilized the screen estate (wayfinding on the welcome/URL screen as well? English?).
Does anyone know the software they're using? I recreated the icon:
This is quite a common thing in digital signage. Not fully sure why but probably just people going with kit they know how to maintain.