That didn't look too bad. It's good they aren't wanting to fight or nip, but you will need to be careful with Gus humping Tucker, as it seems to kind of freak Tucker out a little, so if he gets too nervous he may bite. And definitely separate quickly if they are humping the wrong end, or you may be paying the vet a visit if they are still hormonal and you can still see their little wee-wees. If they are still coming out when they hump, you may even want to wait another week before trying again. You also may want a little bit smaller area where you can more closely supervise and more easily split them up if you need to. You could even just block off part of a room to make it a little smaller. You just want to be able to easily reach them and separate them, since they are just interested in each other and not so much in playing or exploring yet. But that did look good in the second video, a lot like Buster and Phoebe. And maybe it means the hormones are starting to fade too.
I’m amazed it has taken Ellie this long to flop a lot in front of you :\ poor sweet Morgan, your heart must’ve been aching!!! Mine is just thinking about that. You trapping Ellie in a box sounds kind of comical. I’m not sure how I would be able to do that with GusGus, haha.. but I am kinda cracking up about your husband you talking about your wild animal; I guess you both were kind of right when it came down to that. 
