Propshaft/Driveshaft throwing grease and low rumble noise when driving.

Hey all,
08/14 build, 15MY 3.2 TH. 91k klms.
For the last couple of months or so I’ve had a low rumble sound when driving like maybe a wheel bearing but I can’t really feel where on the car it’s coming from.
I‘m moving state soon (another thread) and have been trying to decide if I can do it in the jeep or sell and buy something else.
I finally crawled under the car today to see if I could see anything obvious and noticed that there is some grease splattered from one joint/bearing on the main driveshaft (what I would call the prop shaft).
So a few questions and I have posted some photos and a video hopefully.
Would the grease in photo one (this is on the joint/bearing nearest the front of the car) account for the noise I mentioned by itself?
Should the shaft in photo 2 bend down like that as the others don’t seem to (this is the one at the rear of the centre heat shield)?
In the video there is a noise and movement of a few mm in all directions when I try and move the shaft, is this normal and if not is it caused by play in the splines going into the transfer case/ptu or something else?
I’ve been watching a couple of threads inc one by Gary which sound similar to my issue and called in my local Jeep garage when passing to get a price on the shaft in case it was that. As I understand no bearing on the shaft is replaceable, you have to buy the whole thing and I got quoted $4750 AUD part only P/n: 68610951AA.