So anyone know how likely
Dual ISO video is? or
Variable bit rate?
These two features, would probably improve video IQ the most.
And as for follow-up, when you select 720p from HDMI (for clean output streaming), regardless of canon aspect you select
it will output as 3:2. And if you want to use EOS utility, you can record with it, although I have not done it for any length of time, as I generally stream the HDMI.
There was a poster a page or so back asking about how to get clean outputs, just check on my recent posts and you will find your answer
how to set it up.