I have a newer chromebook with an Intel Celeron n4020. As far as I can tell, this chipset / GPU supports directplay for x265 / hevc content. However, I’m a bit disappointed that the Plex app cannot direct play x265 / h265 / HEVC.
I’ve installed the Linux desktop app, and it appears to be direct playing the same media. However, I think it is using CPU to decode it, as it doesn’t seem that fluid and sometimes choppy. I don’t think it’s using GPU acceleration.
This is definitely a issue on plexs end as I have the same spec chromebook as the original poster, N4020 8GB ram and VLC has no issues playing anything.
I honestly don’t think Chromebooks will ever work with Plex as it’s just not a priority for them