Error code
Error -2114 pops up on Apple TV
This has nothing to do with High Sierra, an operating system for Macs.
This was posted elsewhere on Apple Communities:
"Errorcode 2114 relates to: unknownFormatErr = -2114, which suggests that the video format is not recognised by the Mac OS system. Quicktime errors run from 2000 to 2499. A word of advice: if you feel
compelled to download any video or audio file converters, download from
the App Store, not from a website."
Keep in mind AppleTV will not support Windows Media Player DRM video, or video Airplayed from a DVD Player.
Converting video from a DVD Player may pose problems with copyright restrictions, thus we can't discuss such procedures here. Contact the studio of the video creator to ask for a video format you can use on the AppleTV if you desire to use it in your household.