Tube sites with massive clips on them burn serious bandwidth. They will end because the business model doesnt work. You Tube runs at massive losses.
You can make good bank using Tube sites and uploading all your free movies and let the clown running the site pay for your bandwidth for your site to be promoted.
I think tube sites which limit the size of files will make money allowing they know how to sell the pay site.
I dont think tube sites are anything to worry about. Rapidshare and forums like this
http://planetsuzy.org/ will kill the market.
Rapidshare must be the most joined site in the world today.