I'm planning to leave a very long and detailed video (maybe a cheap external camera, not on my phone) where I describe exactly how and why I killed myself. I don't want anyone to be left with questions, even if they don't like the answers. I think a speech is apt because I want people to hear it in my voice, from my mouth, with the tone I intend. I wouldn't post it online, but I want it to be freely available to anyone who wants the answers.
I'll have to write some smaller notes as well for various people, but mostly I'll just be directing to watch the video. It'll say everything there is to be said about it.