Driveshaft play into transfer case

[grounch]

Hello

I noticed that when i switch the gear lever into different positions, there is some kind of bump and delay to get the torque.
Then i recorded what's happening under the car and here what i got (doing P R N D and back) :

https://youtu.be/8jfirVNlR5s


There is no disturbance when driving, except maybe a "bump forward" when going from 2 to 1 at a stop.



Is that normal? I guess not, so what's the issue, gravity, and solution?

I'm actually in 2WD because of the steering angle sensor, i plan to replace it soon. Won't it create a bigger problem when the transfer case will need to do it's job?