The draw of Plex (cloud or otherwise) is that it handles all that for you. It'll transcode to the correct format and even embed subtitles if you need it to. On

The draw of Plex (cloud or otherwise) is that it handles all that for you. It'll transcode to the correct format and even embed subtitles if you need it to. On the backend it uses ffmpeg so it should support pretty much any format. I think it even supports HEVC.