Need a bulletin board idea for PC+Plasma

Question

open source

At our university, there are several so-called electronic bulletin boards hanging in the buildings, consisting of a netbox + plasma PC with Windows XP installed on them. Remote access. Moreover, the second “board” is geographically far away and the traffic to it goes through the Internet via VPN and costs money.
Now working with them is organized as follows:
In OpenOffice, a presentation is made from a set of ads, which is then exported to a set of pictures.
Pictures are thrown onto the machine where they are shown in slideshow mode using Irfanview. It is convenient that when changing the presentation, you do not need to restart the slide show, unless, of course, the names of the pictures remain the same.
Need ideas for an alternative software implementation of EDI.
It is desirable that would be cross-platform and without paid software. It will be great if there is the possibility of autorun at boot, ease of creating and updating ads.

There are such ideas:
HTML + CSS - I know a little about them (but the disadvantages are the complexity of creating ads (that is, it requires knowledge of HTML, I don’t know how to spin it all in a circle in full screen).
Video editor - but is there such a thing under Linux to be the ability to make a picture from the elements?

Answer 1

HTML+CSS+some JS+chrome fullscreen. If the slides are template, then the knowledge of the above tools will be needed only during creation.

Answer 2

HTML + CSS + JS - it is not necessary to make ads at all. The path of the ad remains as a picture, insert them as an IMG or as a background.

Answer 3

pictures + JQuery - almost the same as yours, but prettier
html + css + JQuery - will eat less traffic
CMS - will eat less traffic + the ability to edit from anywhere on the Internet, access to different people, sorting goods by tags, the ability to make promotions /discounts/themed ads