Looking for real time video streaming/editing software for commercial snips
Any decent software media player can do this. I'd recommend Potplayer.

It has a playlist module --> that's your 'queue'. It has a repeat playlist feature --> that's your loop. And you can add/remove/shuffle the entries in the playlist during playback. Potplayer can display still images but it defaults to a duration of 10 seconds. Not aware if that can be changed. You can duplicate the image entry in the playlist to have a play duration in multiples of 10 seconds. And you can get a custom duration by using ffmpeg to create a video of the still image like this:

ffmpeg -loop 1 -i imagefile -t 01:45 imagevideo.mp4


(1 minute, 45 seconds in the above example).

Use the 32-bit static build of ffmpeg from here.

The other logging/auditing features are probably not possible with regular media players out of the box. Digital signage softwares probably have them.