Far more than that... YouTube alone claims "100 hours of video are uploaded to YouTube every minute":
https://www.youtube.com/yt/press/statistics.html
...which comes out to 144kh/day. In other words, one of these discs would be enough to store ~3 days worth of contributions to YouTube. So a box of these discs, let's say 1000 of them - which isn't all that big (e.g. http://www.amazon.co.uk/Neo-Aluminium-Storage-1000-sleeves/d... ), could hold an archive of every single video that has ever been uploaded to YouTube.
I am now reminded of this: http://www.youtube.com/watch?v=Y_UmWdcTrrc
Edit: got beaten to mentioning YouTube, but there's many other video sharing sites on the Internet, and of course there are probably countless hours of one of the types of video the Internet is well known for: porn.