Thorium was designed to run on 1600x900 resolution, but supports 1920x1080 resolution as well. You can also try 1366x768 resolution as well, but some elements might not line up properly. 1024x768 resolution may also work, but again - your milage may vary.
With the recent upgrade to Chrome 71, audio autoplay is now blocked before user input. This means that the sound player won't work unless you click on the page. See more information here. You can still have the webpage autoplay. You just have to change some settings.
- Open up Chrome on any computer that runs a sound player or viewscreen.
- Navigate to chrome://flags/#autoplay-policy
- Change the 'Autoplay Policy' option to 'No user gesture is required.'
- Restart Chrome
This is not necessary for the dedicated Thorium Client application.