Great link, and anyone with a site should file. I'm not sure that someone with only a youtube account can file as he's not actually hosting things himself, youtube is. (edit: actually in their list there are 11 individual youtube channel owners who have registered using their youtube channel address. Some of these also have their own separate sites though. Example: http://www.copyright.gov/onlinesp/agents/h/hyundai_motor.pdf. Also, the Copyright Office's list there is abysmal - if the person lists the site starting with "http" or "www" then it is indexed under H or W and not the actual site name. Since they have no search capabilities, it's rather likely many won't be found by someone looking to file a complaint.)
Also, according to that page and schedule of fees, prices have been raised, and it's $105 now, plus $30 more if you have more than one domain name to register for, up to 10.
Also should note that the person in the link doesn't want to reveal his address or his legal name, and although the "Designation of Agent" form only asks for the address of the agent, the "full legal name" of the service provider, which would be him if he was self-hosting and unincorporated, is also required.
Also, according to that page and schedule of fees, prices have been raised, and it's $105 now, plus $30 more if you have more than one domain name to register for, up to 10.
Also should note that the person in the link doesn't want to reveal his address or his legal name, and although the "Designation of Agent" form only asks for the address of the agent, the "full legal name" of the service provider, which would be him if he was self-hosting and unincorporated, is also required.