I don't have a mobile phone. Landline only and it can't get pics or videos.
If there is side to side slack in the transmission shaft, there should be sign of oil leakage as well. If it ain't wet around the shaft, the transmission is ok and the yoke itself is worn. The part has been superceded to a new one which is a little harder material, but not too hard. U-joints are not too bad to put in. Internal clips. Unfortunatly it sounds like you may be looking at pulling the engine, then removing the shaft from the tractor; I'd suggest replacing both u-joints, the front yoke and the coupling that is bolted to the engine pulley as well as the rear yoke. This will give you many more decades of trouble-free operation out of the shaft assembly and you'll likely never have to worry about it coming apart in the future. Same thing I had to do to mine; it really ain't that hard to do either. Took me maybe 2 hours to get the shaft out including engine removal. There is only a cable and a few wires, radiator hoses, etc then 4 bolts-lift it off and you're right there. While it's apart, it's a wonderful time to power-wash the tractor frame so that when you reinstall the engine it will be nice and clean.
There is another way to do it; well two more ways. First one, remove the steering wheel, all of the electrical components, disconnect the harnesses, remove the dash assembly, then steering shaft. Unbolt and remove the steering pedestal then remove the floor assembly. At that point you can kind of pry the engine forward on it's rubber mounts to free the shaft from the transmission and then remove it. If it's a 4 wheel steer model the steering gear is kind of in the way. This is not quite the hardest way to do it but close. The hardest way is to disassemble the shaft in the frame. Unless you have racoon hands, it's not even worth trying to do it.
Just pull the engine...real easy. Just like a BX tractor, actually exactly like a BX and people hate those HST cooling fans for that reason, but it's not all that bad. Guarantee you that if you have any mechanical aptitude, you will get through with it and think, "man that wasn't really that hard".