Who sent the video?

But if that's how he got his revenge, by destroying her life, then he's insane.

Yes, you got it. While it's pretty clear she did not send the video, she went into immediate damage control and turned it into her advantage. She was humiliated in the office but heard the comments being made about her and recorded them in case she would need them later. She didn't want to be fired. When her new boss Skip said she could go home, she opted to stay and tried to act like the video was no big deal. But once she was fired, she faked a panic attack to make herself look like a victim. At that point, she had no idea she would win a settlement but she was trying to turn the odds in her favor. And it worked.

She was recording conversations before Jack ever sent the video. You make it sound as though the email was sent and then she started plotting. She was already planning to con them, or at least have some sort of blackmail, long before the email.

You also still haven't acknowledged the question I asked earlier. If you believe that she sent the video herself, explain to me why she would choose to send a video that does not have anyone from the firm in it AND in which she admits to liking being paid for sex (making them suspicious that she is an escort), instead of leaking the video of David Tellis that has him looking like he would fire her if she didn't have sex with him. One video makes her look suspicious, the other does not. What is the motivation? If she had just went ahead with the David Tellis video, instead of settling in the lawsuit so that they didn't dig deeper into the comments made, she would have been able to continue forward with a stronger case and won much, much more.

Lastly, she tells us exactly what happens in the resturant scene with David. She says "she dealt with it", or something along those lines, in regard to the email and then how she twisted it all into her favor...just like the lawyer she wanted to be would.

What a lovely day!

http://www.vulture.com/2016/05/girlfriend-experience-recap-season-1-episode-9.html

"Blindsided" opens where the last episode ends, albeit from a different angle. Jack is calling Christine incessantly on her work phone. When she decides to pick up, it's David on the other line, calling her into his office. At the end of "Provocation," David receives an email seemingly from Christine's personal account (although, considering its contents, it's obvious she's been hacked). In that sequence, we didn't see what David was watching, but it was clear that Jack recorded one of his encounters with Christine. In this episode, it's clear just how explicit the video is. Jack's face can't be seen and his voice is altered; Christine is in full view of the camera while they have sex.

Yes. In a show like this with a 30 minute format and no overt explanations, clues are important. I think a very significant clue was the scene when she retreated into a stall in the ladies room after Tellis had first shown her the video. In that private moment, which was not for the benefit of anyone else in that office, we see her scrolling through the video on her phone to look at the list of recipients. We also see her wiping tears away. If we are to believe she sent the video, what is the point of her needing to see who it was sent to? And why would she cry at that moment? Also, we know she wanted the inheritance from Michael but turned it down to prevent her family and office from learning exactly what the video revealed. Although the P.I. had posed as a client, she had refused to take his money or do anything with him, so he couldn't prove prostitution. But it was explained to her that if she took the inheritance it would become a matter of public record that Chelsea was Christine. So even if no one could prove prostitution, her relationship with Michael under an assumed name and his leaving her a half million dollars would indeed be dubious for her family and office. So it makes no sense that she would then release a video of herself having sex while saying she liked being paid for it. Nor would there be any reason to include her family in the audience if she was sending the video to the office in hopes of them reacting in a way that would be prosperous for her. But she had no way of knowing if that would happen. And of course there is the matter of Jack threatening her, harassing her and then disappearing from her life the moment the video is sent. There is also her angry reaction when Tellis met her at the restaurant to tell her she got him fired by secretly recording them having sex. She responded, "Welcome to the club!" Because the same thing had happened to her.

All of those clues indicate Christine did not send the video and that Jack did. The only clue to the contrary is her mother's comment that she didn't believe the person who shot the video was an angry ex-BF. But some viewers prefer to think they see a clever twist by believing she sent the video, all evidence to the contrary.