I want to use my YouTube channel and video pages to promote my website. I have read a website that talks about backlinks and anchors which use something like: <a href=http://foo.com>foo</a> to create the backlink . However as I know I cannot create a backlink like that in video description. How I can create a backlink for my website in YouTube?  
How to create a backlink in my youtube channel/video pages to promote my website?
seo;backlinks;youtube