That depends on how dense the data is. Do you mean un-compressed video, black-and-white video, high-definition video? Un-compressed CD quality music takes about 20 times as much room as MP3 files, but has higher quality. The same applies to video; the more compressed it is to save space, the lower the overall quality.
For example, I'm converting Batman Begins from .wmv at 320x240 to .mp4 at 640x420 to play on my iPad. The .wmv version is 462MB, the .mp4 version is 686GB. It's runtime is just shy of two hours, so we'll say 470MB for the .wmv and 700MB for the mp4. Thus, you can get around 4,400 hrs of video with the .wmv compression and just shy of 3,000 hrs at the .mp4 compression. (That's assuming you have all 1,024 GB to play with on the drive).
Short answer: A lot. It all depends on how compressed the file is, and that's really your choice for what you want to use it for (will it be played on a HDTV or a laptop?) and depends on a lot of factors (i.e. Pre-conversion quality, original file size, etc.)
Almost 20 hours
Roughly 1,429.
4 million minutes
It can at least hold up to 4 hours of video on the 8GB.
An hour of standard video takes up about 1GB, while an hour of high-definition video sucks up 4GB
The amount of space needed to store video files will depend upon the amount of compression applied to the file. In general one terabyte will store around one thousand hours of compressed commercial movie quality video.
One terabyte = 1024 gigabyte
there is 1000000 mega bytes in a terabyte
1 Terabyte equals 1099511627776 Bytes
1 Terabyte = 1024 gigabytes.
Some video cameras have a file size limit of 4GB. The answer will also depend on what type of video you are recording. Standard video (TV resolution) will require much less memory. The various HD video formats will require much more. Another wikianswer indicates that a 2GB card can hold two hours of video. But it gives no indication of the video format. Casio claims 9 minutes 11 seconds per GB for their Exilim Pro Ex F1. So an 8GB card could hold 73 minutes 28 seconds of HD video. But it would need to be split into two or more files.
1,024 gigabytes (GB) equals 1 terabyte (TB) A terabyte is 1,024 gigabytes.
A 4gb Mp3 player can hold anywhere between 800 and 1400 songs. It depends on how long the songs are( 4 minutes or less if longer then you get less songs). You can hold 1000 photos. I'm not sure yet how many videos it can hold but I think 1 video takes up 2 or 3 songs. But if you put a video in it the music video will seem like a very small square in the middle of the screen.