I have a Getz 2009 1.6 when I hit the brakes after a long drive I hear a clicking sound ... My mechanic insists nothing is wrong..

Below is a link of a video i have recorded, the sound appears in second 12 & 13, it appears when i drive for an hour or so:

https://app.box.com/s/16t9mdu4mcg2efcz2i81vph9up1eqhn7

Thanks!