i have the 50" for >1 yr already, made many posts here, so u may want to check them.
like i hv said many times here, the best thing about this 4kTV besides the great colors is the google androidtv 5.1 inside, same as that found in sony and philips 4ktv's. if u know google android from yr tablet or phone or box, it's easy for u as it is the same thing. but if totally new, been using windows/ipad/iphone, never google android, will take some time to learn as it is different.
the ue630x comes with google playstore and google/sharp approved apps like kodi, youtube 4k, netflix 4k, bloomberg, es file explorer. there are less than what u see with other devices where there are like a million apps. however, u can sideload other apps via usb using an app called es file explorer. only when the tv detects a malware or potentially harmful stuff will it reject and not install.
all things about "androidtv box" will apply to the android in the tv.
androidtv boxhttps://forum.lowyat.net/topic/3126605/+4200kodi is one big app, empty by itself, u need to build it. takes a while to learn how to build, use and maintain. not for the impatient or hv no time. when successful, can be highly rewarding, incl 4k video streams.
kodihttps://forum.lowyat.net/topic/3943906/+1820i have been using google android for a few years now, so i am familiar with it on all devices. if u have good broadband speed like >25mbps, u can get a lot of good stuff, incl 4k videos. the android built in the ue630x is a good one, as good as those selling rm200-300 in the market now. for certain things, i use the tv, no need a separate box. i use box mainly for usb playback of high video and audio quality files thru home theater.
thanks a lot. just start reading and googling through youtube