It depends on what the AAR is focused on.

For training and pure action, video works well.

But my IL-2 or RoF AAR's couldn't be done with video, as they're largely about the pilots and their squadron...

I really enjoy text and pictures AAR as this is something great to read while eating breakfast or at lunch break (which works great on a tablet pc for example), just like a newspaper story - I can interrupt my reading, chat and do other stuff then come back to it, so it's something that works differently than a video. I'd miss your text+pictures AARs if they would disappear BeachAV8R.

Or just alternate... should keep 50% happy at any given time

I prefer scrolling slowly through the text, the recent BS2 Deployment AARs you did forced me to cough up for BS2 so I can replay them myself.

Living in a corner of the world where fast internet connection is (for me) an unaffordable luxury, I have to vote for traditional screenshot and text AAR.