Graham In settings "Additional features" there is now a checkbox for media preview this will add a embedded preview to the interstitial download page (on supporting devices) .
The option will NOT work on upgraded ad free sites these will either open the file or download it if __xt_download=1 is set in the link
The audio file version will follow soon
devices that cannot play embedded video will see a link that will play the file instead
or just the normal download page
I am still testing the details

 Junior Graham What about sextgem adult content?

 mv Junior This functionality works for all sites.