Good question, mate.

There are a whole host of Original Trilogy ‘Making Of’ / BTS documentaries in here to add to your list:-

Guide to Star Wars Documentaries and Special Features

^ not just in the Rodney’s Google Spreadsheet - also check benduwan’s useful info post in the above linked thread too. 👍

ZkinandBonez’s YouTube/Vimeo/etc. finds for Original Trilogy making-ofs, documentaries, promos, etc thread is also well worth a read for seeing if there any more for inclusion to your list.

There are a host of OT docs up in the ‘Documentaries’ section of An Index & Help Thread for The Expanded Universe as well, but you’ll likely have to ‘IMDB’ them to get the dates they were made / or released.