The post helper, for content creators, could be implemented as an add-on javascript that would inject the necessary HTML, etc, to provide the capability for said content creator to input an URL, say from pornhub. The script would then query the CORS proxy to get the HTML from the input URL, do a best effort HTML parse, and then populate the submit post form with suggested markdown to embed a clickable snapshot image that opens the URL. (And hopefully be able to fill in other information, depending on what is in the HTML received from the URL).

The UI front-end should already allow embedded videos, via a hard-coded white list, that would need updating to convert these posts into the appropriate embed video frame (where feasible) that will allow click to play on the dporn.co site.