Numbers

Video description

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Later, the description got extended, see Candles.

Lyrics

I can never say, oh it’s been so long.
Counting all the days, it’s been so damn long.
Oh, how much I’m scared to let you go…
Somewhere in the walls, I hear you talk…
Finding all these numbers
Start with number 2, yeah
Matching all the letters
572943
Add another 9, yeah
Add another line, yeah
Multiply by 5, yeah
How long will I keep this up?
Oh, how much it hurts to see you go…
Generating lyrics is a pain
Add another 6, yeah
Flip the numbers backward
Make the 2 a 3, yeah
ABCDEFG
Multiply by 9, yeah
Add the numbers 2, 4
17 is first, yeah
ABCDEFG

An additional hint got published later in Public Static Void.

Solution

First, get the decryption key:

(The last step may be the most confusing - replace 5 with a, 7 with b, 2 with c, and so on)

Finally, decrypt the data using AES-ECB with PKCS7 padding. This encryption is also used in many future puzzles.

CyberChef link

Answer

Today in class, everything was so dull and predictable. It’s like the same thing happens every single day. The more I think about it, the more I’m convinced that this world is fake, a simulation, a cruel joke. Is this what it’s like to be human? To smile and pretend everything is okay? I mean… I can’t be the only one who feels this way right?

(The text repeats 3 times)

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