I watched the streams and some of my suggestions for a improved stream after paying attention to comments are:
1- Some of the commenters were completely new Steel Beasts.
2- People were asking about system requirements, given the fact that this is a military training tool, common knowledge suggests high end PC, when in fact anyone with even a i7 4770k like myself can enjoy it fully.
3- Some watchers, like myself, were more interested in the new features of 4.1. From the video itself, I could spot only a few changes that were not mentioned by the Mat during the video. I think that with a bit of preparation, some, if not most new features could have been exploited in a single live streamed scenario.
4- Some watchers asked about the damage modeling. The AAR could have been used to show the capabilities of Steel Beasts, but more importantly, a description of Steel Beasts is a pro tactical training tool and has the damage modeling that is required for that.
5- No mention was given to the forums.
6- The video should have been a multiplayer, otherwise, more attention should have been given to the mission editor.