tense

ambience

atmosphere

cinematic

fearful

chills down spine

trouble

troubling

angst

dismay

apprehension

discomfort

jitters

heebie-jeebies

mysterious

hypnotic

cinema

synthesizer

chills

discomforting

serious

climactic

nervousness

spacious

fright

film

video

youtube

trailer

terror

thriller

disturbing

frightening

threatening

distressful

inauspicious

menace

threat

danger

dangerous

suspenseful

scene

production element

chilling

intimidating

intimidate

hair-raising

unnerving

fearsome

chill down spine

heebie jeeby

chill

hair raise