u/Aware-Firefighter462

I have followed everything not his video up until 2:40 cause I do not care about the custom skins and every time I try to view Coreelec in expert mode it just shoots back up to video and only allows me to view coreelec in advanced mode I was wondering if someone could help me figure out why that is happening and also what settings I should set my tv to cause I will only be using it to watch 4k remux movies mainly from CiNiPHILES and Framestor

Do I need the ugoos 6b+ to be able to play my 4k DV remux movies properly without stutters or can I get a 3.5 inch hard drive enclosure with a 12 v power adapter for my 16 tb WD Red pro drive and play the movies threw Kodi and have no problems mind youmI do not care about FEL 7 just want DV and no compression