I was able to type 'vlc' into the command prompt and saw that it was available. I'm not sure if ioJukebox works on Attract Mode, as it produced an error attempting to load the layout.nut file. If anyone has ideas on what to do next or if I could use another media player, I'd be willing to try it. I also looked into Fruitbox, but it only works on the Pi Zero, 1, 2, and 3 models only.