Please don't put videos as attachments on the board - this will put severe strain upon the message board software and will result in us having to delete the attachment !
The best way is the way Bradders describes - as a link to another website space.
Although we have the physical space on our server to hold the file, each download would eat into our monthly allowance of bandwidth, so I can't really make an offer even to host such large files
Eamonn.