Ages ago i baught "Voice Changer 6.0 Gold", it is a great program, you can do this with a program like this. You record different tunes of "Drew"'s talking and tell the program this is a voice and write down what he is saying. Then you can record your voice and it can make the letters sound more like Drews would say them.
To do it like this would be a great idea, but it should really sound like Drew...
In fact we have millions of ideas. But less than 1% are written down or drawn.
The only things you could show (at the moment) would be a handful of experimental drawings and a lot of text. IMHO it wouldn't be a very colorful/attracting video... In videos you show things which are at least at alpha stage. When the right material is done, a video will be done easily like 1 2 3.
You should try to be patient with Demos/Trailers/Video/etc because otherwise it would impress like the alpha version of Windows Vista. Do you want to get your most favourite game compared to vista ? I don't