There are hundreds of lithium battery devices aboard an aircraft, I would assume almost every aircraft in the skies has at least one pilot owned device stowed on each side of the cockpit.
It's saying that he placed them on the glaresheild, but would any pilot consider taxiing and taking off with an ipad, iPhone and bottles STILL ON the glaresheild? Doubt it very much, as such they would likely have been stowed next to the FO seat.
Of course it's possible it was a pilot owned battery that caused the problem, but a video showing them in the cockpit is evidence of nothing.
Edit: As ATC Watcher said actually!