I realized a while ago that the database entries are encoded in HTML. I don't know how it was done on the Disney Shorts encyclopedia, but now you'll have to type the raw HTML in your comment if you want a link of any kind to show up. Take this example from my comment (really a nice mini-article from magnil) on the underrated
Tales of a Street Corner :
"These "keys" are often comparatively cleaner than their US peers, more like a tie-down / 1st clean-up / semi clean-up drawing in US system (like the 2nd drawing in this <a href="https://johncelestri.blogspot.jp/2011/07/1st-pass-roughs-semi-roughs-clean-ups.html">post</a>, sometimes even close to the 3rd final clean-up drawing)."