It did. It looks like the next video has Mary & Lydia talking, so maybe we will get some explanation? Though I'm not sure there's enough explanation in the world to make it better.

I like your idea about Lydia emailing Wickham's employers! I'm envisioning her sharing the letter with the internet, and then being like, "You know what? I should take DIRECT ACTION." And then she types up an email, and the video ends when she presses send...cliffhanger!