[Feature request] Integrate org-yt feature (online image preview/editing)

[firmart]

From this answer of emacs.SE, we can display online image in an Org buffer (actually only .png, still requires some investigation for others). It would be interesting to integrate the feature of org-yt (which is not a complete package as its purpose was answering an emacs.SE question). Some features I can imagine are the following:

• Consider the link [[krita:<https-link>]]
  • Display the online image whose the url is <https-link>.
  • Edit it with C-c C-o (as it was an offline .kra), save the edited image to a .kra and overwrite the old link (prompt if necessary).
  • Export to pdf & html with possibly mixed online and edited images.

An interesting workflow would be, for instance, using org-protocol-capture-html to capture a web page as an Org buffer, then be able to edit the online images captured.