Many private label rights products come with pre-made html pages that can be uploaded to your hosting account through cpanel or other software such as Filezilla.
But if you have a WordPress site, you might not want to do that. So going from html to WordPress is the best thing to do.
Below is a video from Justin Popovic, from BestQualityPLR.com where he explains how to go from HTML to WordPress.
Justin Popovic offers excellent private label rights products. Get on his list to get early notification of when he launches a new package. The price is greatly discounted the first few days.