I just call that ambient... or 'post rock' for the acoustic style ambient (like Sigur Ros), trance refers to stuff like this (which I am listening to now):
I liked that YouTube
I use listening genres'
trance - is al quiet experimental, acoustic ambient, quiet bleep pop, etc....
industrial - refers to the core industrial sounds such as throbbing gristle, merzbow, NON or anything else that will clear a room like a sonic bomb - only for the hardcore. This genre DOES NOT include kiddie pop industrial like Front 242, etc...thats dance music - this is audio bondage.
electronics/dance - for me is stuff with a beat that most people would accept as >music< where as only niche power listeners can take on the industrial/trance listening genres. electronic/dance trance fits into this category for me.
soundtrack - movie soundtracks - "Mouth ov the night" "charlies family" "bioshock OST" "Technosoft game music collection 1 thru 15" etc..
alternative & punk - for me is anything with guitars, vocals, 80's pop, etc.....stuff i liked when i was a teeny bopper or my good time oldies (laundry day music) this is like Bowie, flam punk, punk, pop industrial (weak stuff people like to call industrial like front 242, skinny puppy, etc..) this is a large yet least listened genre for me - especially when im in an LP mood. my listening genre 'trance' contains great symphonic masterpieces.....>alternative & punk< albums are a bunch of songs
country - this is my personal listening genre for my self recorded/composed collection of over 5,000 pieces of music.