If you are thinking of replacing the seals in it then its easy.
Here are a video of how to do it.
part 1:

Part 2:

I have the parts to rebuild mine but dont have the time for it.
Bought the parts from his site.

 

I am not going to be doing the seals in it, it is holding pressure quite well, so no need to crack the system open. I do, however, have a squeaky pulley that needs some lovin.

I think I found the part I need here: http://jeepair.com/compressors/grand-cherokee-clutch-assembly-5-2-5-9-liter.html It is the pulley and clutch.

And this video auto-played after part 2 of your linked vids:

Thanks for the vids, kind sir!