5 digits in youtube task

Today I had the curiosity that more code digits are displayed than are actually possible.
The code displayed is 5 digits and is shown as a mismatch.
www.youtube.com/watch?v=20GDQQmPMZ8
From 7:47 the code 97774 appears.
If you omit the first digit and type 7774, the code is shown as correct. Must know ;-)

Wooggins

I got that too a couple weeks ago. Guessed right about 7774 because I think I remembered seeing that before.

meetje138

Thanks for the info