Did you read this post:

mradultaffiliate.com/how-to-start-a-porn-site-and-make-money/

I have explained in a great detail what these two plugins and how do they work.

Basically, the KenPlayer is built for blogs, tubes, any WordPress site that embed videos from third party sources like XVideos, PornHub, RedTube. It uses its own player that removes pop up and other kinds of ads that these big tubes would display on your site if you would not use the KenPlayer.

The KenImporter Pro is also built for the same kind of sites, but it has different functionality. This plugin helps you to find and add thousands of different videos to your database aka website. You can search for any content by keywords and it will display results from all different tube sites, I think it works with PornHub, Xvideos, XHamster and a few other ones.

You can use them both at the same time and both are quite useful but not required to build your own adult website.

I am using the KenPlayer on my adult sites and it works fine. You can also see on the demo page that this plugin seems to be working: javbang.com.

I am not sure what you are really asking here, Lucky 🙂 The KenPlayer purpose is to remove tube ads from the embeds and it does not import any videos at all.