LG TV Wont Play Video

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Without Jellyfin or ffmpeg logs (you can zip them and add them as an attachment here or, preferably share them via a pastebin site) there's not much anybody can do. It would just be taking shots in the dark. Could be codec issue, could be config issue (e.g., hardware acceleration setup incorrectly, transcoding disabled as user), or it could be a network problem (such as insufficient bandwidth over wifi). Even if the LG is hard-wired, I don't believe the ethernet hardware will handle a high-bitrate remux depending on the model. For instance the LG-C1 has a GARBAGE ethernet setup that caps out extremely quickly -- I bought an external adapter.