Yesterday, 09:57 AM
Spitballing (as I don't have much info), but it seems that some of your media is able to be played directly and some needs transcoding. There should be logs under "Dashboard/Logs/[playtime].log" in your server admin. that hopfully provides more information. With the info provided it _seems_ that there's an error with your ffmpeg install (this is a guess) but either looking through the logs to halp figure out what's wrong with your transcoding, or externally transcoding everything to something that's univerally supported (x264 through handbrake usually) could help.
If logs are provided I can try to help further.
If logs are provided I can try to help further.