So I've been sure for awhile now that it makes difference on your rotation if you hold or force your joints mid air. For example getting into the position of a long stick while spinning will speed you up you will also kinda loose all of that speed after a few seconds. It makes it impossible to do multiple flips in one jump.
Though by holding all in that position this invisible force seems smaller and you can spin noticeably longer.

I just wanted to know if there's any guide, tutorial or explanation on this to better understand it.

I'm not the best at tricking, but I find holding all and just contracting a few joints in mid air to make my spins faster.

Last time I checked Toribash where quite good at conserving angular momentum, but gravity of course acts like a friction sometimes if that is what you're aiming at...

Glad i'm not the only one.

Not sure we're talking about the same thing. A similar thing I've actually used to win aikido matches is self-grabbing to slow down mid air.
Here's a replay to show it.