have you check boxed the motion blur icon on all your layers and also check the motion blur settings? (the check box looks like three discs stacked on top of each other on the layer switches. Motion blur setting is in Composition > Composition Settings > Advanced tab - make sure the motion but is set to 180 (shutter angle) & -90 (shutter phase)
This may be caused by critical panning speed problems or by your cache. Here's why there are critical motion speeds that just don't work with video from the Adobe Forum's AE FAQ list: FAQ: Why does horizontal motion stutter (judder) in my movies, such as during pans?
All checked as suggested by StormyCPb. Thank you so much.
Impressive tutorial by Rick Gerard, much more than I have ever expected.
I´ve changed the traveling speed and it seems that it´s all working properly.
Thank you both for the high level professionalism.