27 Jan 10 9:22 am
The main way of including links is in the profile page. This can give you link juice but I do not think many actual visitors will go and look at your profile (unless your a big youtubing personality) and follow the link back to your website so adding it to the profile is mainly for linkbuilding. Displaying your url in the actual video as a watermark is obviously for getting visitors back to your site and it works great in my opinion. Especially with a strong call to action.