I'm a very visual type of person; it really helps me to nail down ideas when I can see them in front of me.
I also know that a lot of key decisions made at this point will affect future events. For example, one (minor) frustration I have with YouTube is that, other than with the annotations, you can't edit your videos. So, you might develop lots of inbound links and embeds to a particular video, and if you need to make a change in the future, you're pretty much out of luck. Sure, you can delete and re-upload, but then you lose your view count, search engine position, inbound traffic, and so on. So, even though an Opinion will only have one Audio at any given time, I'll allow them to be replaced (and possibly restored?).
I'm not going to post the whole thing publicly, but let me know if you want to get a private copy as it develops.