Hrrm. Gave it a spin with a HDR 4K video on a non-HDR screen with default settings. Washed out, over-saturated, unwatchable colors.
Tried finding tone mapping options. Apparently, those are only available for the OpenGL for Windows output. Changed to that (automatic is D3D11). Great, nice colors.
Full-screened. Then back to windowed. Crash. Happens on many (but not all) 4K HDR MKV files here.
So yeah, not really working at all that well. Back to Potplayer for now (I had been using VLC for years, but for 4K videos it just wouldn't work all that well).
Tried finding tone mapping options. Apparently, those are only available for the OpenGL for Windows output. Changed to that (automatic is D3D11). Great, nice colors. Full-screened. Then back to windowed. Crash. Happens on many (but not all) 4K HDR MKV files here.
So yeah, not really working at all that well. Back to Potplayer for now (I had been using VLC for years, but for 4K videos it just wouldn't work all that well).
Nice on the Chromecast features though! :-)