Commercial hydrogen today is not made with electrolysis, and neither was the hydrogen used in 1806. That hydrogen came from ammonia, and today's commercial hydrogen mostly comes from methane. Since methane has twice as much hydrogen in it as water, it can be converted more economically. Tarpenning is simply showing his bias, and some of his points are valid, but there have been amateur tinkerers running cars on hydrogen since the early 1970's when a college student used to drive his old station wagon around my town using hydrogen stored in rubber inner tubes in the back of the car. At the time I ran my VW van on propane using nothing more than a regulator and an extra nozzle in my carburetor that I installed myself. Neither one of us ever exploded.
He failed to mention the worst consequence of admitting that this might be a positive factor. It would not compensate for his loss of grant funding from NASA (he has three grants) that pays for his salary and graduate students.
Entropy requires no maintenance. -- Markoff Chaney