So it was something really dumb yet it took me all day to figure out.
When the plugin was first installed and activated, it made two pages, as it does for everyone. When I was trying to figure out the redirections for subdirectory install, I had edited too many files to remember so I deleted the plugin and reinstalled it.
Upon reinstalling it, the plugin again created another video categories page. I deleted one of them. It turned out that the one I deleted was the one that the plugin was using to display categories, authors, featured, recent, popular, etc.
When it couldn't find it, it was redirecting all of these links to either a 404 (which included the subdirectory folder) or to the home page, which was the thing that was just confusing me.
I simply couldn't find anywhere else on my site that was redirecting ANYTHING.
Apparently it was this page problem.
So I created a (notitle) page with the [videomore] shortcode, and deleted the other one that existed, cleared the permalinks and saved agani, and waited some minutes before somehow, and thank god, the database recognized what I was doing and it started to identify this page as the page it should use for the categories, authors, etc.
Otherwise, I feared I was going to have to go into the tables and fix this.
As for the widgets, they redirect fine to this page to show featured, recent, popular, etc.
But as for the category and author links, they were still linking to a 404 because it included the subdirectory install.
I redirected these with a redirect plugin. I don't know why these don't redirect well yet the widgets do.
Maybe developers may comment.
I hope this has helped someone.
I finally think I have a working gallery for the site.
Thank you all,