Porn site SEO - Keywords

[Repack]

Greetings,

I have kinda new tube site around fetish niche and when I do keyword research (KWFinder) by domain I dont see any keywords, its all blank.
When I use some keyword view tools I have really shitty keywords there.
Problem is I have around 300+ videos and alot of them have keywords in title that I want to target, but for some reason they are not apprearing in keywords view tools, only some shitty ones that I have written on main page somewhere. Its like videos titles and their descriptions are not counting in...
Am I missing something, or ?
I am kinda new into wordpress and stuff so..
(I am using YoastSEO - they detect 0 seo problems)

 

[MisterXYZ]

May be kwfinder does not have database of adult kwds.

Have you tried any other tool.

 

[Repack]

May be kwfinder does not have database of adult kwds.

It does, when I try to find my competetors, who already ranking for some keywords pretty high, I can see them... (Those keywords I want to target are 18/100ranks = easy btw. on KWfinder)
Same for MozRank.. I am stuck at 0.10 and domain authority 0... did onpage seo, backlinks (12now),etc,...