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Video

Video is the representation of moving visual images, often accompanied by synchronized audio, that can be captured, stored, transmitted, and displayed by electronic devices. The term covers both the process of recording moving images and the resulting footage that viewers watch on screens. In common usage, video contrasts with film, which historically refers to images recorded on photographic film; video implies electronic sensors, digital processing, and often non-linear editing.

Historically, video emerged through mechanical and later electronic systems in the 20th century, with analog broadcasting

Video data is typically stored in containers such as MP4, MKV, AVI, and MOV, and encoded with

Uses span entertainment, education, surveillance, telecommunication, and video conferencing. Editing and compression enable flexible post-production and

and
videotape
becoming
widespread
mid-century.
Digital
video
rose
with
advances
in
data
storage,
compression,
and
online
distribution
from
the
late
20th
century
onward.
Today,
video
is
delivered
via
broadcast,
optical
discs,
local
storage,
and
streaming
over
networks,
with
high-definition
and
ultra-high-definition
formats
commonly
used
in
consumer
and
professional
contexts.
codecs
including
MPEG-2,
H.264/AVC,
H.265/HEVC,
VP9,
and
AV1.
Parameters
such
as
resolution,
frame
rate,
bit
depth,
and
color
space
affect
quality
and
bandwidth
requirements.
Common
resolutions
include
720p,
1080p,
4K
(2160p),
and
higher,
with
typical
frame
rates
of
24,
30,
and
60
frames
per
second.
efficient
distribution.
Accessibility
features
like
subtitles
and
captions
improve
inclusivity,
while
legal
and
technical
considerations
involve
copyright,
licensing
of
codecs,
and
adherence
to
relevant
standards.