CV axle

My lower ball joint on my driver side failed as I had just begun to backup in a parking space. The car dropped to the side I stopped of course and then put it back in park. I was able to jack it up and put the bolts back on as it has stripped down and off and drive onto a flatbed and bring the car home. Today I have taken the wheel off and I am in the middle of taking that bad lower ball joint off when I noticed that my CV axle seems a bit loose. I just rebuilt the front end of the truck myself three months ago when this same ball joint failed before. This time however, the CV axle boots are not torn but I cannot remember how much play there should be in and out when I am moving the wheel. So my question is how do I know if that is the CV axle needs to be changed while I am under the car? I am able to barely turn it left and right meaning if I grab it with my hand and try to twist there is a little play but not very much but when you take the whole wheel assembly and swing it out on that control arm and swing it back in that hole CV axle moves in and out on that inner joint. If that makes sense? I have a video of what I am saying however this website has not allowed me to upload it.