Refinance step in BRRRR strategy not clear to me

[NhiQuann Jones]

From my understanding, if you renovate the property and the value goes up, you get your property evaluated. You want to value to increase from what you paid for it (plus what you put into it for renos). So when you refinance, you get a loan for about 70% of the value of the property to do new deals? I don't get where you get cash in your pocket that is yours, and not a loan.