4k hd

Here you have only full movies in 4K quality, when you open the link choose from3 players some of them dont work!!!

I'm interested in acquiring high quality(fidelity) adult content but I'm unsure about which route I should go. For the companies that don't offer Blu-ray and only DVD format physical copies. I'm wondering if it's better to get a membership and download from their website to get full 1080p or 4K...