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I used a source of pink noise (my iPhone with Ambiance app) positioned within 2 feet from GH3 to normalize the recording levels for all the options. Here are the settings leading to the same perceived recording levels:
Great summary which I wholeheartedly agree with. Nikon D5300 Review and why DSLRs are dead for video
Shame to see DSLRs overall and Nikon specifically loosing it so fast. Makes me feel better about my moving to GH3.
I did use Ustream to broadcast this event. Loved Ustream Producer software, possibility to integrate desktop streaming, ease of editing "shots" which allowed to mix multiple streams and create goodies such as on-screen logos. A custom-built PC with i5 CPU and two Blackmagicdesign DecLink Mini Recorders was used as a software switcher and encoder.
Now my customer wants to use YouTube Live and I am testing it! It appears that both Ustream and YouTube use custom versions of Telecast Wirecast, thus all the mechanisms of creating the shots and actual streaming are the same! Except not entirely. Productization is a bit different. Looks like you will need to pay more with YouTube to have possibility to edits shots. Both however want $200 from you to not have their watermarks in your feed.