Android is no problem at all, Tizen however is a mistake I will never do again. I have a MU7000 samsung TV (2017 model), it has plex (came free in its store) but no emby (emby is another option that is mostly open source) or jellyfin (Emby fork that is fully open source). I had an Intel NUC5 celeron based that acted as a server, the cpu was pretty efficient (6w) but it was not powerful enough for transcoding (converting the video to something the tv can play)

My experience with my Samsung TV.

Plex: Can direct play almost anything (stream to the tv without converting the video). I'm a non-native english japanese anime fan who needs subtitles all the time. The problem is that plex will turn to transcoding if subtitles are on and my server was not powerful enough to handle fluent transcoded stream.

Emby: it is not in the tizen store (at least for my tv), fortunately the emby team release a tizen binary that can be installed through a USB thumb drive. Now emby works pretty good with and withouth subtitles. It does not have ads (for premium subscription) on android but it does have a once every 24h add in the Tizen version. Not a big deal but just remember you are more likely to be treaded a 2nd class consumer for having a damn Tizen TV.

Jellyfin: Not available on Samsung store, I had to enable devlopper mod on my tv and install Tizen studio with CLI on my pc to compile Jellyfin for my TV, then install it through Tizen CLI only to be surprised by how sluggish it worked, the UI was very unoptimized which is natural as it was not supporting my tv to begin with. Half my remote (samsung one remote black version) did not work so I decided it was not worth it.