Yes, there are episodes and Daily MIWODs using techniques which are not covered in Becoming A Supple Leopard. Different combinations of techniques, tools etc. are used based on the current situation.

New videos are added daily, there are different series of videos (coach’s eye, Diagnosis Series, Pro Episodes and more). BASL is a wealth of information and applying that knowledge to situations.

There is a search function on the episodes and Daily MIWOD.
Not sure what you mean by “if positive”

There are some different items you can use to narrow the search. The search is not able to search all of the videos because it takes too long to go through all of the pages of videos.
You can do a manual search going through the pages of the archive.