That's a great video and a cautionary lesson about the myth of cameras being waterproof. "Weather sealed" does not mean waterproof, despite may people's expectations. Weather is such things as wind-blown dust and perhaps light rain, but not being absolutely soaked or immersed in water - that is the space for a 'Tough Camera" that is fully sealed and has an under water rating.
Also, the amount of weather sealing can be completely degraded by putting on a non-sealed lens. The biggest hole for ingress of water is the lens mount, so having a sealed lens is absolutely critical.
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
