Ok, so let me try again: OP didn’t say Netflix is FOSS. Nobody is saying Netflix is FOSS. OP is asking for something open source that can run proprietary software, which happens to be an alternative to Android TV. Your comment didn’t answer OP’s question and just added an unecessary and obvious comment which gives the idea that you are judging OP for utilizing proprietary software. If you are able to consume only free and open source software/hardware, good for you! That’s it, just make an attempt to be helpful and nice when people are trying to consume more open source stuff.
Edit: I saw that you actually gave an answer to OP afterwards. That’s nice!