This does not play 4K videos.  It will get choppy about 3 seconds in and then freeze.  The processor is very weak. The fan is very loud and runs constantly.  The whole thing is extremely slow.  We were going to use these for some deployments as kiosks, digital signage, time clock websites, etc.  Basically these are useless unless it's for your grandma to type emails on.  These are not for TVs to watch movies on or theatre systems.