Resolution not more than HD

S905 devices have a video output plane that supports 4K resolutions, but the OSD plane used for the Kodi desktop supports 1080p max. As Kodi skins are 1080p max and the S905 chips is too weak for 4K desktop with graphics; use 1080p and be happy. NB: The original Android image has been hacked to show a 4K option to stop users moaning about the lack of one, but when you configure this you get 1080p (the same silicon limitation of 1080p on the OSD plane applies).

If you don't see 4K resolutions in the whitelist for video playback (on the video plane) it's an EDID issue from the TV and there's a workaround in the EDID article in the wiki.

NB: dtech has an LE 9.2.8 image for WP2 if you want something marginally newer and with updated TLS certs.