This is the thing
"Only five of these can be unlocked to view, but that shouldn’t matter as only four are worth watching anyway."
If I didn't have any (or some) of those titles, it would be because I couldn't be bothered or didn't want to buy them. So the content owners wouldn't lose anything by letting me unlock all of them. But no, their content is so valuable that it has to be 'allowed' a little bit at a time, my precious.
Note to 'content' producers: I can get a good two or three days of intermittent immersive entertainment experience by reading a good book, and those are widely available though monochrome and quite low resolution. Maybe you should up your game and produce content worth consuming and let me decide which five minutes to watch as a 'trailer', instead of your two minute choice of extracts in YouTube (or wherever).