How many gigabytes is 1 hour of video?
This vastly depends on the compression rate of the video , uncompressed video is very large and depends only on the resolution (i.e. HD 1920x1080 or old TV (SD) 720x576) anyway a minute of uncompressed HD quality video is about 7GB a minute of uncompressed SD is around 1GB.
So compression is used to make this smaller. For an hour of HD with good compression you are looking at around 1.5GB
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