It can accelerate up to 9.8 m/s², albeit in a downward direction. The top speed would be about 100 kmh, assuming it has the same aerodynamics as a GoPro (source).
Aggitis Gorge: A Unique Geological Phenomenon and Ecotourism Paradise
More information and photographic material can be found on the channel's website.
On YouTube you will see the video with English subtitles.