I agree it’s probably too complicated for an ordinary user, but one can upload a gblorb (or another format) along with the web version and use the hidden URL where the file is really hosted. For instance, https://iplayif.com/?story=https://v6p9d9t4.ssl.hwcdn.net/html/8686879/Demo%20Inkform.gblorb
In this URL, the 8686879 is changed every time you re-upload on itch. As for the domain, as discussed here, it’s going to change soon but it’s supposed to be stable after that change.
For a semi-automated version, IFDB could extract the https://v6p9d9t4.ssl.hwcdn.net/html/8686879/ part by fetching the regular itch page and looking for the iframe src attribute but the file name would have to be provided by the user.