Google Translate translates the video text as:
Westerland / Sylt: squall tilts event stage on the promenade
On Sunday, about 18 clock, recorded a strong gust of wind the big event stage the Super Sail event, and fell over them. The stage was on the side to lie, there were no casualties. The Westerländer firefighters secured the design, and hid in the hours that followed the stage.