英文關鍵字
green
screen
background
backgrounds
simple
special
effect
wallpaper
advertising
frame
stop-motion
graphic
modern
transitions
presentation
motion
graphics
colorful
key
color
kids
transition
liquid
blue
transparent
alpha
channel
video
geometry
masking
strips
template
tv
chroma
flat
moving
distortion
geometric
promotional
round
seamless
element
overlay
4k
animation