Hi @luceos Base on his idea Kryonoglou
I think, you may add one additional template for displaying the custom files.
I see the 3rd option is :
Complete image preview template: Shows the complete image in-line. No download functionality, no statistics are gathered and hotlink protection is ignored.
If another custom extension was added, and using those 3rd Image Preview, It will hidden after post. It is for direct hotlink purposes. So, the preview template usable for getting the direct hotlink only.. ?
Just my personal thinking...