I have an idea for the Kickstarter video. Basically, do like Freedom Planet did with it's Kickstarter and have the characters talk about the game and why a Kickstarter is being done. (Link to the Freedom Planet Kickstarter trailer so you can see what I'm talking about: https://m.youtube.com/watch?v=8wNTKzaZjho)
That would mean text, because the characters don't talk, they make noises. Probably not a good idea because of this, we all know it people don't read nowadays, it's has been.
Banjo only really says three words in DKR. I guess it's similar, but not as drastic as explaining an entire game and then switching to mumbling when it arrives.
My idea for the kickstarter video is that they say 9/11 a few times and include god in every sentence possible and bring the word "banjo kazooie successor" every now and then then you will have yourself a bunch of money afterwards.