"Jump" video, normal ?

[Xblog]

Hi,
i'm a newbie pilot i saw on my first videos some little jumps ... is it normal ? how i can fixed that ? any advices for settings (gimbal adjustments ?) ?
thank you for your help !

 

[razors]

Post a video

 

[Xblog]

Hi,
It's exactly like this : what caused the jump in the video @ 0.15 & 0.18 any ideas ?