... to talk about in your PS. You want your application to ... and made my DS and PS about totally different things so ... one rule for writing a PS: don't be boring! If ... of a topic for your PS my advice is to think ...
@JoeyPotato - there's a note in pink below the video that clarifies that the biconditional notation in the video is a mistake - I didn't notice that until now.
Nice catch!
II'm not particularly knowledgable about PS, but I've got some broader experience in editing and writing. I'd be happy to give you my thoughts, if you thought that would be useful.