AFAIK this is one of the ways the gnutella network works. For those rarer files or less than common files, requests for such a file will queue up. This happens more-so to video files because they take longer to downld leaving other people on the wing. Their requests accumulate & are then centered toward those who have the file. My understanding of this is but that's the way it seems to be. Some requests may even be old ones & not necessarily real-time. What this equates to is more difficulty in connecting to the larger files such as video files & more difficulty in getting slots for such which may mean not getting optimum slots for speed. But I don't know.