Probably in the top 10 for youtube channels ever is smpfilms. I typed into google link:http://www.smpfilms.com to find out how many backward links he has. Surprising he only had 6. Yet Kidrobot had over 1,200. Maybe some business's look into paying experts to create backward links, as smpfilms is not short of hits because it gets a large amount of traffic through the youtube channel. Just interesting to find out, try any website type link: before the full http://www.asittingduck.com, mine is only 7 at the moment but I'm going to look into whats available, link for link takes ages!. I'd be happy with traffic from the youtube channel but backward links are the strength for any website business as with youtube you can be world famous one week and the next noone wants to know. Hope this was of interest, probably my most interesting entry so far if you are thinking of building a .com empire!.
Thanks
David