Try going to xxx.xxx.xxx.xxx:52199, which should take you to the new Panel web interface. Then go into Audio, Video, Images, etc. and see if they work.
I suspect that they won't. WebGizmo has been getting a bit of a makeover since MC23.0.34m and was broken in that release. It seems it still is. I can't play most Video or Images. Home Videos play okay, maybe because they are in mp4 format. Although not all mp4 Movies play.
Dunno. Broken.