Here are three videos I found on the Tokyo Metropolitan Government's own YouTube channel.
The first one is about the Mr. Aizawa who's in charge in the CTC office:
https://www.youtube.com/watch?v=x7vGx7edwu4
The next one is about Mr. Yamada, a Mitsubishi employee who designs the cars:
https://www.youtube.com/watch?v=D972J7etmbk
And in this one, Mr. Takaki who inspects the cars:
https://www.youtube.com/watch?v=SSaWCOOLR0k
Lots of other interesting stuff on this channel