[[!comment format=mdwn
 username="http://smcv.pseudorandom.co.uk/"
 nickname="smcv"
 subject="comment 1"
 date="2011-09-11T10:20:14Z"
 content="""
You could use a relative URL in a standard [[ikiwiki/MarkDown]] link:

    [download the video](../downloads/video.mp4)

or an ikiwiki [[ikiwiki/WikiLink]] to the file (just like you would for a page):

    \[[download the video|foo/bar/downloads/video.mp4]]
"""]]