I posted this on Reddit today since it seems when I receive an update to LibreELEC Krypton, videos will not play on my Intel Celeron NUC NUC5CPYH after the update.
An update to Krypton LibreELEC, videos will not play. : libreELEC
I have verified after a fresh new build of LibreELEC Kodi version 7.95.3 when I enable under UPnP/DLNA settings, with expert settings turned on, 'Look for remote UPnP players' and reboot my media center, I cannot play videos after that. I have tested it, turning off that setting rebooting, then videos appear to play after it is disabled. I tried three times and the same issue occurred every time I enabled that setting and rebooted.
I am not sure if you need any more information to take a look at this issue to see if you can determine why it is occurring, I will try to help out as much as I can. Thank you.
Update: Here is the log file from the first machine, with the video failing to open: Dropbox - kodi.old.log