No, the compressed Hydrogen was not measured. You wouldn’t measure the specific chemical composition of gasoline in the tank of a car. You just measure its capability, 50mpg, 100mpg, etc. Then you measure that against another car, and another, etc. That’s black box testing. Such ‘input’ does not need to be accounted for, because they all use the best fuel available at the time, in this case gasoline. In the case you are inquiring about, it would be compressed hydrogen.
No. But If I was claiming that I got 800 hp out of the engine, just using 'gas', while in fact I was leaving out the Nitrous Oxide 'fuel' I was adding to the engine's intake ports, would you not suspect my claim ?