I been using this app on my iPhone for a few years now and it's a great app. Today they are bringing it to the aTv 4 and it looks awesome. The app supports a total of 14 different ill formats, from standard MP4, M4V and MOV to MKV, AVI, WMV, MTS, FLV, OGM, OGV, ASF, 3GP, DVR-MS, WebM and WTV. Also supports Dolby Digital Plus, DTS and DTS-HD audio. Trakt.tv integration is also included and subtitle search like Kodi. Don't get me wrong, the Plex app is a great app but this one in my opinion its better.
http://www.idownloadblog.com/2015/12/03/review-infuse-4-for-apple-tv/