I believe with the right program you can resave the video file either into the same filetype at a lower bitrate keeping aware of quality acceptability as the bit rate lowers, or you could save into another filetype which could perhaps give acceptable quality at a lower bitrate.
Other filetype examples are the way that a DV-AVI format from a tape camcorder is about 220 MB's a minute region, but when converted into a DVD video format which is quite acceptable quality for a standard dvd disk is about 60 or less MB's a minute, nearly a quarter of the size but quality still OK.
You never mentioned the size and filetype of the video you wanted to send and whether you had sent it yet via a large file transfer site
The odd time I've emailed short clips from home made videos from my camcorder or still camera, I've used Windows Movie Maker cut the piece of video in WMM and resaved that cut as a Windows Media Video file, WMV file type and emailed the WMV file as an attachment, when it will play on recipients Windows pc's in Windows Media Player.
Large file transfer sites are good for large video files, however even with broadband the upload speeds of sending the file is only a fraction of the download speeds, so you could spend a long time uploading something that someone will download fairly quickly and can make a big deal of sending a video clip easily to people, that's why I tend to reduce into a smaller size WMV file in Windows Movie Maker and just normal email send as an attachment.
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