Ip Is Trying To Download The Same File Many Times

We have a video streaming server, sometimes the server gets really slow and when we digg into it, we see that the same ip is trying to download the same file many many times. for example i either run this command

netstat -n | grep :80 | awk '{ print $5 }' | awk -F: '{ print $1 }' | sort | uniq -c | sort -n | tail

or go to WHM and see the 'apache stats' and i see 100 http connections from the same ip, trying to download the same video 100 times,,,

what is this? is this some sort of attack? could that be 100 different people that use a proxy? or what is going on?