Question about my journey - Clickbank

Hi i am in clickbank and i want to know some things.
I am doing Clickbank+Youtube+Blog.

First of all, when people says that they do clickbank+wordpress it mean that they buy free worpress blog or that they are doing a web with hosting and with wordpress plugin?

Second, when i upload a video in youtube what i must put in the description, my CB affiliate link or my blog link?

Third, What i must put in my blog, the affiliate link of CB what leading to product landing page or the payment link that appears after click in "Buy now" in landing page?

Youtube - Wp. Blog - clickbank.
use the link you genervte in cb

Use the video to get them excited about the product, then send them to your blog. On your blog, pre-sell the product and then send them to the main page of the clickbank product (landing page). Don't use the naked affiliate id, but cloak it...some people use url shortners like bitly but you'd get much better results using html or php redirects.