Out of these three, Windmills is actually the only one I've played in any capacity, but that was a really long time ago, so very blurry memories. Generally, it's what happens when someone wishes to make a real time strategy game in Freespace engine and universe, mostly using the communications menu to interact. Might be pretty boring for a stream, but I think you could at some point make one stream about how people bent FSO as far as crossing the genre borders, starring Windmills, too. But I think you should give it a play before that happens, maybe you'll find something fun in it that I didn't, or that I just forgot about over that time.
While I didn't play SHUMPspace, from what I've seen about it, it might be decent stream material, given its shoot-em-up nature. I think it's also pretty short, so it might be a part of some combo stream?
As for Bem Cavalgar, from what I know about it, it's one of these deadly serious campaigns that actually give you a capacity to make imporant choices, with a bunch of moral grayscale. For example, you can either go and secure resources to replenish your dwindling weapons accessibility, or save a civilian convoy fleeing from a fleet of murderous Shivans. Which one do you choose?
If it reads like I've got nothing specific on these, that's because I don't. My interactions were either non-existant or too far back to recall. So I'm looking forward to seeing these in your streams at some point too.