I would encourage you to label some recordings as appropriate when she gets a little older, and include in those recordings your deepest regrets, your proudest moments, and how you learned to overcome obstacles that you found in your way.
I would avoid the temptation to spend time on these recordings that you would otherwise spend with her in person. Don't use the camera as a means to avoid spending time with her, because i *know* the temptation may creep in when you begin to feel ill, and you don't want her to remember you as sick.
Include lots of recordings of the two of you together, enjoying life. Take her hiking, go see every sweet father/daughter movie there is, go to dances, bungie jump together. These aren't specifically nerd things, but they are things that will make her really look up to you and your legacy, and she will see your footsteps as admirable, and she will come to realize the way you lived is fit for her too. Show her that nerds are awesome.
I wouldn't wish what you're going through on my worst enemy, and if there was something I could do to give you two one more year together I would give it a shot. I'm sorry for your spot, but I applaud your attitude and your desire to do this for her. You're a great dad.