> Default to 240: I want to be able to always watch videos in the worst resolution possible. I want the lightest bandwidth possible. I'd sometimes be happy with just the audio. It seems that I can't default to 240, no matter what I click.

Strange you mention this, because just minutes ago I changed a video to 240, and it prompted me to save my preference (the text was headlined with "Slow Connection?"). Maybe a new feature?