True as this may be, it's even irrelevant to his argument if he actually wanted to change his setup for the benefit of himself and the stream.
His main excuse is that he has to have it blowing out the window and it has its own exhaust duct to do so, but it's literally nothing more than like a 3" radius piece of flexible ducting. He could easily buy 10 feet of the stuff and run the hose along the wall, or even tack it up to the ceiling if he didn't want it to get in the way. That shit is not heavy, you could probably get away with just using an adhesive on a plastic bracket.
Of course, it's entirely possible that the exhaust ports on both the AC and the window are some weird proprietary shit that you can't disconnect, so that means it's impossible for him to change. Any reasonable person would realize you can just cut the hose in the middle and splice the ends together to extend it, but dearest Dave would argue he would be voiding whatever manufacturer warranty he has (guarantee it's no more than 2 years, so it's expired). It's such a simple solution that any person, not even a man, who doesn't want to look incompetent would be able to put into action.
I haven't looked anything up, but I can't imagine it costing more than like $40 for everything to extend the hose: $20 for 10 feet of some flexible duct, maybe like $6-7 for a small roll of good duct tape, then another ~$15 for the various bits of plastic, aluminum, and a double-sided adhesive to mount it on the ceiling if he went that way.
Propose it on stream as a goal and he'd get that money in an hour since his chat would call his bluff on him actually doing it and the trolls would start putting singles in his electronic g-string to see how long it would take our lord and master to do an hour's worth of manual labor, not including the rearranging and cleaning, of course.
I'll hop in his stream chat early and see if I can catch him when he's 'wassap'ing everyone and try to get an answer.