I am referring to this:
NES Longplay  Takeshi No Chousenjou ^^^
I've had no luck researching this. From Google, to the World-Of-Longplays website, to Wikipedia's stub of an article on Longplays, there is no information about that 3-digit number.
I assume that the number is an ID that correlates with the corresponding game library for the system being played (allowing for up to 1,000 entries per console), but I could be wrong, and it doesn't seem right that it would only allow for 1,000, rather than 10,000 (seeing as the NES has over 700 games, which is dangerously close to 1,000), and can probably be outdone. I also have no idea where they get the number from. Chronological order? What if two games are released on the same date (such as Pokemon)?
The questions boil down to:
- What do the numbers mean?
- How are they determined?
- Assuming it's an ID, is there some sort of catalog listing the numbers and the games they identify?